DTC digital currency cannot be cashed

1. It's very similar to bitcoin
DTC is the first distributed digital currency based on sha256 encryption algorithm. The whole network is composed of users, so decentralization is the guarantee of DTC's security and freedom. From the first day of birth, dotcoin has been publicized to the world for many times. There is no pre digging behavior of a company or its founder, which avoids the possibility of being hoarded by a few people in advance
in terms of security, the private key is required to manipulate the multi token, which can be stored in any storage medium in isolation. No one can get it except the user himself
more importantly, dotcoin has been endowed with the attribute of transaction since its birth. Compared with the scarce stock of bitcoin, dotcoin has become a perfect supplement
dotcoin is a magical existence that combines these advantages, and it will certainly overturn the traditional impression of digital currency. In addition, dote China will be online soon, which is a good time for investors to seize the opportunity. Dare to be the first to eat crabs! As dotcoin is being accepted by the majority of investors, it will change the concept of financial management on the Internet and affect every corner of our lives in the future.

2. It's hard to say that digital currency exists legally in China and is a kind of virtual property, which is protected by law in China. In the bitcoin risk notice issued by the central bank at the end of 2013, bitcoin was clearly defined as a special Internet commodity. People can buy and sell bitcoin freely at their own risk
however, there is still a lack of supervision on digital currency in China, which is legal as long as we do not engage in illegal activities. For example, bitcoin, lightcoin, token DTC, ether coin and so on.

3. I don't know what you mean by cryptocurrency in the world. Fire coin network refers to support bitcoin and lightcoin transactions. Bitcoin and lightcoin are the most well-known and accepted in the coin circle
in addition to these two tokens, there are also some well-known tokens, Ethereum's token, Ethereum's token, and DTC's token of decent, a decentralized content sharing platform

4. It's very similar to bitcoin.

5. Institutions are beginning to experiment with this new technology
DTCC is a clearing house in the United States, which processes billions of dollars of transactions every year. The global credit card processing network visa is only one of the most well-known pilot projects carried out by non banks. That is to say, some financial sectors are certainly more active than others
major stock and commodity exchanges can be said to be the most active institutions participating in blockchain experiments. For example, NASDAQ, a major U.S. stock exchange provider, even released its own blockchain trading model last fall. This program, called LINQ, can trade and track the shares of private companies. NASDAQ has positioned it as an early experiment of blockchain technology to expand the scope of major stock trading and even the scope of new asset classes< br />Blockchain_ Stock exchanges
although the subtle areas are more different, the 10 major stock and commodity exchanges in the world have shown interest in blockchain technology. In this article, we will give you a detailed introction:
1. Australian Stock Exchange (ASX)
when it comes to the application of blockchain technology, ASX is definitely one of the most ambitious companies. In January, ASX invested more than US $10 million in digital asset holdings, a start-up company in the instry, as part of its R & D activities
at the same time of investment, ASX also revealed that it will not only conct technical tests, but also establish a new post transaction settlement system, which will be developed by digital asset through the use of distributed general ledger structure
however, since January this year, the update progress of the project on the Australian Stock Exchange may have been overshadowed by controversy. In March this year, the Australian news media began to speculate that although the Australian Stock Exchange has reiterated its support for the experiment, the blockchain project may also be in doubt with the premature resignation of Elmer Funke Kupper, the chief executive of the Australian Stock Exchange< CME Group is one of the founders of "post trade distributed ledger working group". At present, CME Group has carried out very positive actions in the instry through its investment department CME ventures
CME Group is unique among its peers. It has been pursuing a diversified investment strategy across instries. It has successively invested in ripple, a distributed accounting start-up company, digital currency group and digital asset holdings. Beyond that, however, CME Group has yet to speak publicly about its actions in technology and the wider instry< br />3.Deutsche B� 0� 2rse
Deutsche B & 65533, the operator of Frankfurt Stock Exchange in Germany; 0� 2rse, another participant on the list, also participated in the $60 million financing of digital asset holdings in January< However, unlike its joint investor ASX, Deutsche B & 65533; 0� 2rse expresses less support for technology
in an interview in February this year, Deutsche B & 65533; 0� 2rse said it is concting a proof of concept for the technology, although it has not released any survey or test results
4. Du multi commodity trading center
in the Middle East, blockchain related activities are relatively rare, and this situation has continued until the recent opening of the global blockchain Council. With 32 members, the global blockchain Council is a group of start-ups, financial companies and technology giants to monitor the application of technology and its impact
based on these members, Du multi Commodities Center is a special economic zone and commodity circulation center responsible for supervising the trading of precious metals and other tangible commodities
DMCC announced in February that it is engaged in a technology experiment with bitoasis, a bitcoin start-up company, to explore how blockchain technology can improve its personnel's entry process< JPX is one of the most active stock market operators in Asia. In February, JPX announced its interest in the instry and has formed an alliance with IBM to become a user of blockchain-as-a-service (baas)
at that time, relevant reports said that the Japanese exchange group was concting a proof of concept study on the role of blockchain technology in creating a new low liquidity asset trading system, and the final results would be published in a report later this year
earlier this month, the Japanese stock exchange group also announced that it is working with the Nomura Research Institute (NRI) to test how technology can be applied to the stock market< Korea exchange is the only stock exchange in South Korea and one of the new entrants to this list. It announced in February that it will strive to launch a counter trading platform through blockchain technology
in a statement to the local news media, Korea Exchange said it hoped the technology would help rece costs. Details of the trial and the company's participation in the group were not released
7. London Stock Exchange (LSE)
LSE is one of the founders of "post trade distributed ledger working group". When it comes to experiments on blockchain technology, LSE is one of the most dynamic and low-key institutions
the London Stock Exchange is one of the largest groups to follow the steps of R3, a start-up company, and it is the first to say that large financial companies will seek to use cooperation mode to conct blockchain testing, which is beyond the framework of R3
since then, some large financial companies have begun to participate in private proof of concept and operation in certain areas of capital markets involving all parties
in addition, like Kouvola innovation and Japan exchange group, London Stock Exchange is one of the initial customers of IBM's blockchain-as-a-service (baas)
8. NASDAQ
when it comes to testing blockchain technology, NASDAQ is probably the most active organization. Nasdaq, the US stock market operator, launched LINQ, a private equity trading platform for the first time in 2015, and thus became the first financial institution to conct a proof of concept of blockchain. At present, the platform is still in the testing stage
in addition, NASDAQ has reached a cooperation with chain, a blockchain solution provider, and allowed its internal experts to talk openly about blockchain technology
in 2016, NASDAQ continued this momentum. More recently, it has revealed that it is working with Estonia's NASDAQ OMX Tallinn stock exchange to conct a trial to use blockchain technology to rece obstacles to shareholder voting
9. New York Stock Exchange (NYSE)
NYSE is one of the first companies interested in the instry. In 2015, NYSE issued two important statements, both of which are related to bitcoin
in January 2015, NYSE invested in coinbase, a bitcoin service company, as part of its round C financing. At that time, Jeffrey sprecher, chairman of NYSE, said the investment showed confidence in the fact that the millennials would widely use digital currency. He described the millennials as having a more progressive view of value exchange
in May, NYSE will continue to launch bitcoin price index, which will become a competitor of coindesk's bitcoin price index (BPI), which is based on the trading data of coinbase trading platform
10. TMX group
TMX group, the operator of Toronto Stock Exchange, has not clearly expressed its opinions on blockchain technology
however, with Anthony di Iorio (one of the co founders of Ethereum) employed as the organization's first chief digital technology officer, TMX also publicly expressed its interest in blockchain technology for the first time in March this year. Next generation network has become one of the most important blockchain applications in the eyes of the public after the proct release in March
nevertheless, TMX group has indicated that it is in the early stage of generating blockchain strategy, and it may conct technical testing soon

6. In theory, it is permanently resident. As long as your program is not finished, there is no need to worry about its loss (HTTP client is another matter)

8. Net framework class library is a library composed of classes, interfaces and value types contained in the Microsoft. Net framework SDK. The library provides access to system functions, and is the basis of establishing. Net framework applications, components and controls

all classes of dotnet framework are contained in the namespace

namespace
. Net framework class library provides the following namespace:

} Microsoft. CSharp
contains classes that support C # language compilation and code generation
Microsoft. JScript
contains classes that support compiling and code generation in JScript language
Microsoft. Visual Basic
contains classes that support compiling and code generation in Visual Basic. Net
Microsoft. VSA
contains interfaces that enable you to integrate the scripts of the. Net framework script engine into your applications and compile and execute code at run time
two types of classes are provided: the class that handles the events raised by the operating system and the class that operates on the system registry
system
contains basic classes and base classes for defining common value and reference data types, events and event handlers, interfaces, properties, and handling exceptions
other classes provide services that support the following operations: data type conversion, method parameter operation, mathematical calculation, remote and local program calls, application environment management, and supervision of managed and unmanaged applications

} system. Codedom
contains classes that can be used to represent elements and structures of source code documents. These elements can be used to build the structure of the source code document. By using the functions provided by the {system. Codedom. Compiler namespace, you can output source code documents to source code written in supported languages
system. Codedom. Compiler
contains types used to manage the generation and compilation of source code in supported programming languages. Each code generator can generate source code in a specific programming language according to the structure of the codedom source code model (composed of elements provided by the ■ system. Codedom namespace)
system. Collections
contains interfaces and classes that define various object collections, such as lists, queues, digit groups, hash tables, and dictionaries
system. Collections. Specialized
contains special strongly typed collections; For example, link table dictionaries, bit vectors, and collections that contain only strings
} system. Componentmodel
provides classes to implement runtime and design time behaviors of components and controls. This namespace includes base classes and interfaces for implementation of property and type converters, data source binding, and component authorization
{system. Componentmodel. Design}
contains classes that can be used by developers to generate custom design time component behaviors and user interfaces to configure components at design time. The design time environment provides a system that enables developers to arrange components and configure their properties
{system. Componentmodel. Design. Serialization}
provides support for customizing and controlling serialization types at design time
system. Configuration
provides classes and interfaces that enable you to programmatically access. Net framework configuration settings and handle errors in the configuration file (. Config file)
system. Configuration. Assemblies
contains classes used to configure assemblies
{system. Configuration. Install}
provides classes that enable you to write custom installers for your own components. The installer class is the base class for all custom installers in the. Net framework
} system. Data
is basically composed of classes that constitute ado.net structure. The ado.net structure enables you to generate components that can be used to effectively manage data from multiple data sources. In the disconnection scheme (such as Internet), ado.net provides some tools to request, update and coordinate data in multi tier system. Ado.net structure can also be implemented in client applications (such as Windows Forms) or HTML pages created by asp.net
system. Data. Common
contains classes shared by. Net framework data providers Net framework data provider describes a collection of classes used to access data sources, such as databases, in a managed space
encapsulate ODBC. Net framework data provider Net framework data provider describes a collection of classes used to access data sources, such as databases, in a managed space. By using the odbcdataadapter class, you can fill in the dataset that resides in memory, and use it to query and update the data source
for additional information on how to use this namespace, see the odbcdatareader, odbccommand, and odbconnection classes

note: this namespace is only supported in. Net Framework version 1.1

} system. Data. OLEDB
encapsulates OLE DB. Net framework data provider. The OLE DB. Net framework data provider describes the collection of classes used to access OLE DB data sources in managed spaces
encapsulates the oracle. Net framework data provider. The oracle. Net framework data provider describes the collection of classes used to access Oracle data sources in a managed space
note: this namespace is only supported in. Net Framework version 1.1

} system. Data. SqlClient
encapsulates SQL server. Net framework data provider. The SQL server. Net framework data provider describes the collection of classes used to access SQL Server Databases in a managed space
describes the collection of classes that can be used to access databases in SQL Server CE from Windows CE based devices in a managed environment. With this namespace, you can create a SQL Server CE database on one device and establish a connection with a SQL Server database on another device or a remote server
note: this namespace is only supported in. Net Framework version 1.1

} system. Data. Sqltypes
provides classes for native data types in SQL server. These classes provide a safer and faster alternative to other data types. Using classes in this namespace helps prevent type conversion errors in situations where precision loss may occur. Because other data types and sqltypes are converted to each other in the background, creating and using objects explicitly in this namespace will also proce faster code
provides classes that allow interaction with system processes, event logs, and performance counters. This namespace also provides classes that allow you to debug applications and track code execution. For more information, see trace and debug classes
provides classes that enable you to read and write debug symbol information (such as the source line of Microsoft Intermediate Language (MSIL) mapping). The compiler for. Net framework can store debug symbol information in the programmer's database (PDB) file. Debugger and code analyzer tools can read debug symbol information at run time
system. Directoryservices
provides easy access to active directory from managed code. This namespace contains two component classes: DirectoryEntry and directorysearcher. These two classes use active directory service interface (ADSI) technology. ADSI is a set of interfaces provided by Microsoft. It is a tool that can flexibly handle various network providers. ADSI makes it relatively easy for administrators to find and manage network resources, no matter how large the network is
system. Drawing
provides access to the basic graphics functions of GDI +. More advanced functions are provided by the {system.drawing.drawing2d,} system.drawing.imaging and} system.drawing.text namespace
{system. Drawing. Design}
contains user interface (UI) logic and drawing classes for extended design. This design time function can be further extended to create the following objects: Custom toolbox items, type specific value editor or type converter, in which type specific value editor is used to edit and graphically represent the values of supported types; Type converters are used to convert values between specific types. This namespace provides a basic framework for user interface extension in development and design
system. Drawing. Drawing2d
provides advanced 2D and vector graphics functions. This namespace includes gradient brushes, matrix classes (used to define geometric transformations), and GraphicsPath classes
system. Drawing. Imaging
provides advanced GDI + image processing functions. The basic graphic functions are provided by the {system. Drawing namespace
system. Drawing. Printing
provides printing related services. Typically, you can create instances of the PrintDocument class, set the properties describing the print content, and then invoke the Print method to actually print the document.
{system. Drawing. Text}
provides advanced GDI + layout function. The basic graphic functions are provided by the {system. Drawing namespace. Classes in this namespace enable users to create and use font collections
system. Enterprise services
provides an important infrastructure for enterprise applications. COM + provides service structure for component programming model deployed in enterprise environment. This namespace provides access to COM + services for. Net framework objects, making them more suitable for enterprise applications
provides classes that enable you to use compensation Resource Manager (CRM) in managed code. CRM is a service provided by COM +, which enables you to include non transactional objects in Microsoft Distributed Transaction Coordinator (DTC) transactions. Although CRM does not provide the function of full resource manager, they provide transactional atomicity (all or no behavior) and persistence through recovery logs
system. Enterpriseservices. Internal
provides infrastructure support for COM + services. The classes and interfaces in this namespace are specifically used to support calling ■ system.enterpriseservices from unmanaged COM + classes
{system. Globalization
contains classes that define culture related information, including language, country / region, calendar in use, date format mode, currency, number, and string sort order. These classes are useful for writing globalized (internationalized) applications
system. IO
contains types that allow synchronous and asynchronous reading and writing of data streams and files
{system. Io. Isolatedstorage
contains types that allow the creation and use of independent storage. By using these stores, we can read and write data that can not be accessed by less trusted code, and prevent the disclosure of sensitive information that can be saved in other locations in the file system. The data is stored in a data compartment independent of the current user and the assembly in which the code resides
{system. Management}
provides a rich set of management information and information

9. The. Net framework class library is a library composed of classes, interfaces and value types contained in the Microsoft. Net framework SDK. The library provides access to system functions, and is the basis of establishing. Net framework applications, components and controls

all classes of dotnet framework are contained in the namespace

namespace
. Net framework class library provides the following namespace:

} Microsoft. CSharp
contains classes that support C # language compilation and code generation
Microsoft. JScript
contains classes that support compiling and code generation in JScript language
Microsoft. Visual Basic
contains classes that support compiling and code generation in Visual Basic. Net
Microsoft. VSA
contains interfaces that enable you to integrate the scripts of the. Net framework script engine into your applications and compile and execute code at run time
two types of classes are provided: the class that handles the events raised by the operating system and the class that operates on the system registry
system
contains basic classes and base classes for defining common value and reference data types, events and event handlers, interfaces, properties, and handling exceptions
other classes provide services that support the following operations: data type conversion, method parameter operation, mathematical calculation, remote and local program calls, application environment management, and supervision of managed and unmanaged applications

} system. Codedom
contains classes that can be used to represent elements and structures of source code documents. These elements can be used to build the structure of the source code document. By using the functions provided by the {system. Codedom. Compiler namespace, you can output source code documents to source code written in supported languages
system. Codedom. Compiler
contains types used to manage the generation and compilation of source code in supported programming languages. Each code generator can generate source code in a specific programming language according to the structure of the codedom source code model (composed of elements provided by the ■ system. Codedom namespace)
system. Collections
contains interfaces and classes that define various object collections, such as lists, queues, digit groups, hash tables, and dictionaries
system. Collections. Specialized
contains special strongly typed collections; For example, link table dictionaries, bit vectors, and collections that contain only strings
} system. Componentmodel
provides classes to implement runtime and design time behaviors of components and controls. This namespace includes base classes and interfaces for implementation of property and type converters, data source binding, and component authorization
{system. Componentmodel. Design}
contains classes that can be used by developers to generate custom design time component behaviors and user interfaces to configure components at design time. The design time environment provides a system that enables developers to arrange components and configure their properties
{system. Componentmodel. Design. Serialization}
provides support for customizing and controlling serialization types at design time
system. Configuration
provides classes and interfaces that enable you to programmatically access. Net framework configuration settings and handle errors in the configuration file (. Config file)
system. Configuration. Assemblies
contains classes used to configure assemblies
{system. Configuration. Install}
provides classes that enable you to write custom installers for your own components. The installer class is the base class for all custom installers in the. Net framework
} system. Data
is basically composed of classes that constitute ado.net structure. The ado.net structure enables you to generate components that can be used to effectively manage data from multiple data sources. In the disconnection scheme (such as Internet), ado.net provides some tools to request, update and coordinate data in multi tier system. Ado.net structure can also be implemented in client applications (such as Windows Forms) or HTML pages created by asp.net
system. Data. Common
contains classes shared by. Net framework data providers Net framework data provider describes a collection of classes used to access data sources, such as databases, in a managed space
encapsulate ODBC. Net framework data provider Net framework data provider describes a collection of classes used to access data sources, such as databases, in a managed space. By using the odbcdataadapter class, you can fill in the dataset that resides in memory, and use it to query and update the data source
for additional information on how to use this namespace, see the odbcdatareader, odbccommand, and odbconnection classes

note: this namespace is only supported in. Net Framework version 1.1

} system. Data. OLEDB
encapsulates OLE DB. Net framework data provider. The OLE DB. Net framework data provider describes the collection of classes used to access OLE DB data sources in managed spaces
encapsulates the oracle. Net framework data provider. The oracle. Net framework data provider describes the collection of classes used to access Oracle data sources in a managed space
note: this namespace is only supported in. Net Framework version 1.1

} system. Data. SqlClient
encapsulates SQL server. Net framework data provider. The SQL server. Net framework data provider describes the collection of classes used to access SQL Server Databases in a managed space
describes the collection of classes that can be used to access databases in SQL Server CE from Windows CE based devices in a managed environment. With this namespace, you can create a SQL Server CE database on one device and establish a connection with a SQL Server database on another device or a remote server
note: this namespace is only supported in. Net Framework version 1.1

} system. Data. Sqltypes
provides classes for native data types in SQL server. These classes provide a safer and faster alternative to other data types. Using classes in this namespace helps prevent type conversion errors in situations where precision loss may occur. Because other data types and sqltypes are converted to each other in the background, creating and using objects explicitly in this namespace will also proce faster code
provides classes that allow interaction with system processes, event logs, and performance counters. This namespace also provides classes that allow you to debug applications and track code execution. For more information, see trace and debug classes
provides classes that enable you to read and write debug symbol information (such as the source line of Microsoft Intermediate Language (MSIL) mapping). The compiler for. Net framework can store debug symbol information in the programmer's database (PDB) file. Debugger and code analyzer tools can read debug symbol information at run time
system. Directoryservices
provides easy access to active directory from managed code. This namespace contains two component classes: DirectoryEntry and directorysearcher. These two classes use active directory service interface (ADSI) technology. ADSI is a set of interfaces provided by Microsoft. It is a tool that can flexibly handle various network providers. ADSI makes it relatively easy for administrators to find and manage network resources, no matter how large the network is
system. Drawing
provides access to the basic graphics functions of GDI +. More advanced functions are provided by the {system.drawing.drawing2d,} system.drawing.imaging and} system.drawing.text namespace
{system. Drawing. Design}
contains user interface (UI) logic and drawing classes for extended design. This design time function can be further extended to create the following objects: Custom toolbox items, type specific value editor or type converter, in which type specific value editor is used to edit and graphically represent the values of supported types; Type converters are used to convert values between specific types. This namespace provides a basic framework for user interface extension in development and design
system. Drawing. Drawing2d
provides advanced 2D and vector graphics functions. This namespace includes gradient brushes, matrix classes (used to define geometric transformations), and GraphicsPath classes
system. Drawing. Imaging
provides advanced GDI + image processing functions. The basic graphic functions are provided by the {system. Drawing namespace
system. Drawing. Printing
provides printing related services. Typically, you can create instances of the PrintDocument class, set the properties describing the print content, and then invoke the Print method to actually print the document.
{system. Drawing. Text}
provides advanced GDI + layout function. The basic graphic functions are provided by the {system. Drawing namespace. Classes in this namespace enable users to create and use font collections
system. Enterprise services
provides an important infrastructure for enterprise applications. COM + provides service structure for component programming model deployed in enterprise environment. This namespace provides access to COM + services for. Net framework objects, making them more suitable for enterprise applications
provides classes that enable you to use compensation Resource Manager (CRM) in managed code. CRM is a service provided by COM +, which enables you to include non transactional objects in Microsoft Distributed Transaction Coordinator (DTC) transactions. Although CRM does not provide the function of full resource manager, they provide transactional atomicity (all or no behavior) and persistence through recovery logs
system. Enterpriseservices. Internal
provides infrastructure support for COM + services. The classes and interfaces in this namespace are specifically used to support calling ■ system.enterpriseservices from unmanaged COM + classes
{system. Globalization
contains classes that define culture related information, including language, country / region, calendar in use, date format mode, currency, number, and string sort order. These classes are useful for writing globalized (internationalized) applications
system. IO
contains types that allow synchronous and asynchronous reading and writing of data streams and files
{system. Io. Isolatedstorage
contains types that allow the creation and use of independent storage. By using these stores, we can read and write data that can not be accessed by less trusted code, and prevent the disclosure of sensitive information that can be saved in other locations in the file system. The data is stored in a data compartment independent of the current user and the assembly in which the code resides
system. Management
provides a rich set of management information and management services

10. C # is a hybrid of Java and C + +

. Net framework class library is a library composed of classes, interfaces and value types contained in the Microsoft. Net framework SDK. The library provides access to system functions, and is the basis of establishing. Net framework applications, components and controls

all classes of dotnet framework are contained in the namespace

namespace
. Net framework class library provides the following namespace:

} Microsoft. CSharp
contains classes that support C # language compilation and code generation
Microsoft. JScript
contains classes that support compiling and code generation in JScript language
Microsoft. Visual Basic
contains classes that support compiling and code generation in Visual Basic. Net
Microsoft. VSA
contains interfaces that enable you to integrate the scripts of the. Net framework script engine into your applications and compile and execute code at run time
two types of classes are provided: the class that handles the events raised by the operating system and the class that operates on the system registry
system
contains basic classes and base classes for defining common value and reference data types, events and event handlers, interfaces, properties, and handling exceptions
other classes provide services that support the following operations: data type conversion, method parameter operation, mathematical calculation, remote and local program calls, application environment management, and supervision of managed and unmanaged applications

} system. Codedom
contains classes that can be used to represent elements and structures of source code documents. These elements can be used to build the structure of the source code document. By using the functions provided by the {system. Codedom. Compiler namespace, you can output source code documents to source code written in supported languages
system. Codedom. Compiler
contains types used to manage the generation and compilation of source code in supported programming languages. Each code generator can generate source code in a specific programming language according to the structure of the codedom source code model (composed of elements provided by the ■ system. Codedom namespace)
system. Collections
contains interfaces and classes that define various object collections, such as lists, queues, digit groups, hash tables, and dictionaries
system. Collections. Specialized
contains special strongly typed collections; For example, link table dictionaries, bit vectors, and collections that contain only strings
} system. Componentmodel
provides classes to implement runtime and design time behaviors of components and controls. This namespace includes base classes and interfaces for implementation of property and type converters, data source binding, and component authorization
{system. Componentmodel. Design}
contains classes that can be used by developers to generate custom design time component behaviors and user interfaces to configure components at design time. The design time environment provides a system that enables developers to arrange components and configure their properties
{system. Componentmodel. Design. Serialization}
provides support for customizing and controlling serialization types at design time
system. Configuration
provides classes and interfaces that enable you to programmatically access. Net framework configuration settings and handle errors in the configuration file (. Config file)
system. Configuration. Assemblies
contains classes used to configure assemblies
{system. Configuration. Install}
provides classes that enable you to write custom installers for your own components. The installer class is the base class for all custom installers in the. Net framework
} system. Data
is basically composed of classes that constitute ado.net structure. The ado.net structure enables you to generate components that can be used to effectively manage data from multiple data sources. In the disconnection scheme (such as Internet), ado.net provides some tools to request, update and coordinate data in multi tier system. Ado.net structure can also be implemented in client applications (such as Windows Forms) or HTML pages created by asp.net
system. Data. Common
contains classes shared by. Net framework data providers Net framework data provider describes a collection of classes used to access data sources, such as databases, in a managed space
encapsulate ODBC. Net framework data provider Net framework data provider describes a collection of classes used to access data sources, such as databases, in a managed space. By using the odbcdataadapter class, you can fill in the dataset that resides in memory, and use it to query and update the data source
for additional information on how to use this namespace, see the odbcdatareader, odbccommand, and odbconnection classes

note: this namespace is only supported in. Net Framework version 1.1

} system. Data. OLEDB
encapsulates OLE DB. Net framework data provider. The OLE DB. Net framework data provider describes the collection of classes used to access OLE DB data sources in managed spaces
encapsulates the oracle. Net framework data provider. The oracle. Net framework data provider describes the collection of classes used to access Oracle data sources in a managed space
note: this namespace is only supported in. Net Framework version 1.1

} system. Data. SqlClient
encapsulates SQL server. Net framework data provider. The SQL server. Net framework data provider describes the collection of classes used to access SQL Server Databases in a managed space
describes the collection of classes that can be used to access databases in SQL Server CE from Windows CE based devices in a managed environment. With this namespace, you can create a SQL Server CE database on one device and establish a connection with a SQL Server database on another device or a remote server
note: this namespace is only supported in. Net Framework version 1.1

} system. Data. Sqltypes
provides classes for native data types in SQL server. These classes provide a safer and faster alternative to other data types. Using classes in this namespace helps prevent type conversion errors in situations where precision loss may occur. Because other data types and sqltypes are converted to each other in the background, creating and using objects explicitly in this namespace will also proce faster code
provides classes that allow interaction with system processes, event logs, and performance counters. This namespace also provides classes that allow you to debug applications and track code execution. For more information, see trace and debug classes
provides classes that enable you to read and write debug symbol information (such as the source line of Microsoft Intermediate Language (MSIL) mapping). The compiler for. Net framework can store debug symbol information in the programmer's database (PDB) file. Debugger and code analyzer tools can read debug symbol information at run time
system. Directoryservices
provides easy access to active directory from managed code. This namespace contains two component classes: DirectoryEntry and directorysearcher. These two classes use active directory service interface (ADSI) technology. ADSI is a set of interfaces provided by Microsoft. It is a tool that can flexibly handle various network providers. ADSI makes it relatively easy for administrators to find and manage network resources, no matter how large the network is
system. Drawing
provides access to the basic graphics functions of GDI +. More advanced functions are provided by the {system.drawing.drawing2d,} system.drawing.imaging and} system.drawing.text namespace
{system. Drawing. Design}
contains user interface (UI) logic and drawing classes for extended design. This design time function can be further extended to create the following objects: Custom toolbox items, type specific value editor or type converter, in which type specific value editor is used to edit and graphically represent the values of supported types; Type converters are used to convert values between specific types. This namespace provides a basic framework for user interface extension in development and design
system. Drawing. Drawing2d
provides advanced 2D and vector graphics functions. This namespace includes gradient brushes, matrix classes (used to define geometric transformations), and GraphicsPath classes
system. Drawing. Imaging
provides advanced GDI + image processing functions. The basic graphic functions are provided by the {system. Drawing namespace
system. Drawing. Printing
provides printing related services. Typically, you can create instances of the PrintDocument class, set the properties describing the print content, and then invoke the Print method to actually print the document.
{system. Drawing. Text}
provides advanced GDI + layout function. The basic graphic functions are provided by the {system. Drawing namespace. Classes in this namespace enable users to create and use font collections
system. Enterprise services
provides an important infrastructure for enterprise applications. COM + provides service structure for component programming model deployed in enterprise environment. This namespace provides access to COM + services for. Net framework objects, making them more suitable for enterprise applications
provides classes that enable you to use compensation Resource Manager (CRM) in managed code. CRM is a service provided by COM +, which enables you to include non transactional objects in Microsoft Distributed Transaction Coordinator (DTC) transactions. Although CRM does not provide the function of full resource manager, they provide transactional atomicity (all or no behavior) and persistence through recovery logs
system. Enterpriseservices. Internal
provides infrastructure support for COM + services. The classes and interfaces in this namespace are specifically used to support calling ■ system.enterpriseservices from unmanaged COM + classes
{system. Globalization
contains classes that define culture related information, including language, country / region, calendar in use, date format mode, currency, number, and string sort order. These classes are useful for writing globalized (internationalized) applications
system. IO
contains types that allow synchronous and asynchronous reading and writing of data streams and files
{system. Io. Isolatedstorage
contains types that allow the creation and use of independent storage. By using these stores, we can read and write data that can not be accessed by less trusted code, and prevent the disclosure of sensitive information that can be saved in other locations in the file system. The data is stored in a data compartment independent of the current user and the assembly in which the code resides< br />▲System.Management