A first chance exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll
问题 Im new to c# client and server application, im working on a file upload client and server application. i can successfully upload my file name and file data to the server from the client application. but when i try to implement a new textbox that allow the file upload client to enter his/her name and send the information together with the file name and file data when he/her click the send button. client application. /* file name and file length */ byte[] fName = Encoding.UTF8.GetBytes(fileName