public void SocketClient_SendFileWithFileType_ToServer() { //Arrange var socketClient = _serviceProvider.GetService <ISocketClient>(); //Act var client = socketClient.Connect("", 1201); var bytes = File.ReadAllBytes($@"{_filepath}\Files\Untitled Document.pdf"); var finalBytes = Encoding.ASCII.GetBytes($@".pdf"); Bytes.AppendSpecifiedBytes(ref finalBytes, bytes); socketClient.Send(client, finalBytes); //Assert Assert.True(client.Connected); client.Shutdown(SocketShutdown.Both); }