Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The data source must contain DBNull for the property to be correctly applied. If the data source type is a type such as a string or integer the value of the property will be ignored. Also, the property is ignored if it is set to null.
A null value will be added to the data source when the control property is set to the object of . If is set to a string value, comparisons are case-insensitive.
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.