DBNull.IConvertible.ToInt64 Method (IFormatProvider)
This API supports the product infrastructure and is not intended to be used directly from your code.
This conversion is not supported. Attempting to make this conversion throws an InvalidCastException.
Assembly: mscorlib (in mscorlib.dll)
Return ValueType: System.Int64
None. The return value for this member is not used.
Available since 1.1
Available since 2.0
Windows Phone Silverlight
Available since 7.0