Question

I would like to open a file using open file dialog. If the opened file length is a multiple of 94 i would like to open that file if not i would like to throw an error message

Answer 1

if(new FileInfo(path).Length % 94 == 0)
{
   using(var reader = new StreamReader(path))
   {
       ...
   }
}
else 
    throw new ArgumentException("File-length not multiple of 94", "path");