System.Net.UnsafeNclNativeMethods.OSSOCK.getsockopt C# (CSharp) Метод

            internal static extern SocketError getsockopt(
                                               [In] SafeCloseSocket socketHandle,
                                               [In] SocketOptionLevel optionLevel,
                                               [In] SocketOptionName optionName,
                                               [Out] out int optionValue,
                                               [In, Out] ref int optionLength
                                               );