Indicates whether the data item at the specified index is unspecified, that is, null.
Assembly: Microsoft.VisualStudio.Data (in Microsoft.VisualStudio.Data.dll)
Calling this method to figure out if a value is null performs better than retrieving the value to see if it is equal to Value, because the latter causes the entire value to be read from the data reader instance.
- 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.