ConfigurationSectionCollection.Remove(String) Method   
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Removes the specified ConfigurationSection object from this ConfigurationSectionCollection object.
public:
 void Remove(System::String ^ name);public void Remove(string name);member this.Remove : string -> unitPublic Sub Remove (name As String)Parameters
- name
- String
The name of the section to be removed.
Examples
The following example shows how to use the Remove method.
static void Remove()
{
    try
    {
        System.Configuration.Configuration config =
        ConfigurationManager.OpenExeConfiguration(
        ConfigurationUserLevel.None);
        CustomSection customSection =
            config.GetSection(
            "CustomSection") as CustomSection;
        if (customSection != null)
        {
            config.Sections.Remove("CustomSection");
            customSection.SectionInformation.ForceSave = true;
            config.Save(ConfigurationSaveMode.Full);
        }
        else
            Console.WriteLine(
                "CustomSection does not exists.");
    }
    catch (ConfigurationErrorsException err)
    {
        Console.WriteLine(err.ToString());
    }
}
Shared Sub Remove()
    Try
        Dim config _
        As System.Configuration.Configuration = _
        ConfigurationManager.OpenExeConfiguration( _
        ConfigurationUserLevel.None)
        Dim customSection As CustomSection = _
        config.GetSection("CustomSection")
        If Not (customSection Is Nothing) Then
            config.Sections.Remove("CustomSection")
            customSection.SectionInformation.ForceSave = True
            config.Save(ConfigurationSaveMode.Full)
        Else
            Console.WriteLine( _
            "CustomSection does not exists.")
        End If
    Catch err As ConfigurationErrorsException
        Console.WriteLine(err.ToString())
    End Try
End Sub