Indicates whether original members of the collection can be removed.
Assembly: System.Design (in System.Design.dll)
When implemented in a derived class, this method indicates whether the specified value can be removed from the collection. By default, this method always returns true.
This method is called when the user tries to remove an item that is an original member of the collection. This method is not called when removing items that were added in the current editing session because they are not yet part of the collection.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
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.