Event Handling

If you only want it to be visible within the containing method, then define the TextReader variable outside the try statement:

                TextReader tr = null;
                try
                {
                  tr = new StreamReader(Path);
                }

                catch(FileNotFoundException fnf)
                {
                  StatusLabel.Text = "File Not Found !"; 
                }
               
                if (tr != null)
                {
                    // do something with text reader
                }

If you want it to be visible in other methods, then you'll need to define it at class level.