Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
You can add controls to the collection, remove controls from the collection, or iterate through the server controls in the collection.Notes to Inheritors:
When you override the property, make sure that you call the EnsureChildControls method.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
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.