SourceStream.SetLength C# (CSharp) Method

	public override void SetLength (long l)
	{
		throw new Exception ();
	}

 public override void Flush()
 {
     if (_modified)
     {
         SourceStream.SetLength(0);
         _stream.Position = 0;
         StreamUtility.CopyStream(_stream, SourceStream);
         _modified            = false;
         _sourcePositionReset = true;
         _stream.Position     = 0;
         _sourceLength        = _stream.Length;
     }
 }