private void PrepareSendPackage()
 {
     BinFileHelper.PrepareFile(TxtSelectedFile.Text);
     BinFileHelper.SetReadLength(int.Parse(TxtReadLength.Text));
     BinFileHelper.SetFixBytes(GetPrefixBytes(), GetTailfixBytes());
     BinFileHelper.PrepareNextBytes();
     DisplayPreparedPackageString();
 }