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ConnectionStringsSection Class

Provides programmatic access to the connection strings configuration-file section.

Namespace:  System.Configuration
Assembly:  System.Configuration (in System.Configuration.dll)

public sealed class ConnectionStringsSection : ConfigurationSection

The ConnectionStringsSection class allows you to programmatically modify the connectionStrings section of the configuration file. The connection strings are provided as a ConnectionStringSettingsCollection of ConnectionStringSettings add configuration elements.

The following example shows how to use the ConnectionStringsSection.

// Create a connectionn string element and add it to 
// the connection strings section. 
static ConnectionStrings()
    // Get the application configuration file.
    System.Configuration.Configuration config =

    // Get the current connection strings count. 
    int connStrCnt = 

    // Create the connection string name. 
    string csName = 
        "ConnStr" + connStrCnt.ToString();

    // Create a connection string element and 
    // save it to the configuration file. 

    // Create a connection string element.
    ConnectionStringSettings csSettings =
            new ConnectionStringSettings(csName,
            "LocalSqlServer: data source=;Integrated Security=SSPI;" +
            "Initial Catalog=aspnetdb", "System.Data.SqlClient");

    // Get the connection strings section.
    ConnectionStringsSection csSection =

    // Add the new element.

    // Save the configuration file.


The following excerpt shows the configuration used by the previous example.

<?xml version="1.0" encoding="utf-8"?>
    <add name="ConnStr1" connectionString="LocalSqlServer: data source=;Integrated Security=SSPI;Initial Catalog=aspnetdb"
      providerName="System.Data.SqlClient" />

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0