private void searchFilesWithSameLengthToolStripMenuItem_Click(object sender, EventArgs e) { FolderBrowserDialog ofd = new FolderBrowserDialog(); if (ofd.ShowDialog() != System.Windows.Forms.DialogResult.OK) return; DirectoryInfo dir = new DirectoryInfo(ofd.SelectedPath); filesWithSameLength = new GroupFilesBySize(dir, this); toolStripStatusLabel1.Text = "files are being searched in "+dir; filesWithSameLength.searchFilesWithSameLengthInNewThread(); }