System.Net.WebSockets.WebSocketValidate.ValidateArraySegment C# (CSharp) Method

        internal static void ValidateArraySegment(ArraySegment<byte> arraySegment, string parameterName)
        {
            if (arraySegment.Array == null)
            {
                throw new ArgumentNullException(parameterName + ".Array");
            }
        }
    }

 public Task <WebSocketReceiveResult> ReceiveAsync(
     ArraySegment <byte> buffer,
     CancellationToken cancellationToken)
 {
     WebSocketValidate.ValidateArraySegment(buffer, nameof(buffer));
     return(_webSocket.ReceiveAsync(buffer, cancellationToken));
 }