Am Unable to Receive Files from Client to Server using C#

int bytesSize = 0;


               byte[] downBuffer = new byte[2048];

               bytesSize = strRemote.Read(downBuffer, 0, 2048);

               string FileName = System.Text.Encoding.ASCII.GetString(downBuffer, 0, bytesSize);

               strLocal = new FileStream(@"F:\" + FileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);


               downBuffer = new byte[2048];

               bytesSize = strRemote.Read(downBuffer, 0, 2048);

               long FileSize = Convert.ToInt64(System.Text.Encoding.ASCII.GetString(downBuffer, 0, bytesSize));

strRemote = tcpClient.GetStream();
                byte[] byteSend = new byte[tcpClient.ReceiveBufferSize];
          
                fstFile = new FileStream(openFile.FileName, FileMode.Open, FileAccess.Read);
           
                BinaryReader binFile = new BinaryReader(fstFile);

          
                FileInfo fInfo = new FileInfo(openFile.FileName);

            
                string FileName = fInfo.Name;
             
                byte[] ByteFileName = new byte[2048];
                ByteFileName = System.Text.Encoding.ASCII.GetBytes(FileName.ToCharArray());
          
                strRemote.Write(ByteFileName, 0, ByteFileName.Length);

              
                long FileSize = fInfo.Length;
          
                byte[] ByteFileSize = new byte[2048];
                ByteFileSize = System.Text.Encoding.ASCII.GetBytes(FileSize.ToString().ToCharArray());
              
                strRemote.Write(ByteFileSize, 0, ByteFileSize.Length);

                txtLog.Text += "Sending the file " + FileName + " (" + FileSize + " bytes)\r\n";

                
                int bytesSize = 0;
            
                byte[] downBuffer = new byte[2048];

              
                while ((bytesSize = fstFile.Read(downBuffer, 0, downBuffer.Length)) > 0)
                {
                
                    strRemote.Write(downBuffer, 0, bytesSize);
                }