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ConnectionStringSettingsCollection.Remove Method (ConnectionStringSettings)

Removes the specified ConnectionStringSettings object from the collection.

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

public void Remove(
	ConnectionStringSettings settings
)

Parameters

settings
Type: System.Configuration.ConnectionStringSettings

A ConnectionStringSettings object in the collection.

The following example shows how to remove the specified ConnectionStringSettings object from the collection.

static void RemoveConnectionStrings()
{

    try
    {
        System.Configuration.Configuration config =
         ConfigurationManager.OpenExeConfiguration(
         ConfigurationUserLevel.None);

        // Clear the connection strings collection.
        ConnectionStringsSection csSection =
            config.ConnectionStrings;
        ConnectionStringSettingsCollection csCollection =
         csSection.ConnectionStrings;

        // Get the connection string setting element 
        // with the specified name.
        ConnectionStringSettings cs =
            csCollection["ConnStr0"];

        // Remove it. 
        if (cs != null)
        {
            // Remove the element.
            csCollection.Remove(cs);

            // Save the configuration file.
            config.Save(ConfigurationSaveMode.Modified);

            Console.WriteLine(
             "Connection string settings removed.");
        }
        else
            Console.WriteLine(
                "Connection string settings does not exist.");

    }
    catch (ConfigurationErrorsException err)
    {
        Console.WriteLine(err.ToString());
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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