BetterExplorer.MountIso.Button_Click C# (CSharp) Method

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (txtSize.IsEnabled == true)
            {
                bool noerror = true;

                try
                {
                    long blah = Convert.ToInt64(txtSize.Text);
                }
                catch
                {
                    noerror = false;
                }

                if (noerror == true)
                {
                    yep = true;
                    this.Close();
                }
                else
                {
                    MessageBox.Show("The value entered in the Drive Size field is not a valid number.", "Error Must Be Resolved", MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }
            else
            {
                yep = true;
                this.Close();
            }
        }