private void Button_Projects_Click(object sender, RoutedEventArgs e) { DialogForms dialogForms = new DialogForms(); dialogForms.AssignSourcePath(); if (DialogForms.SourcePath == "") { return; } Docs docs = new Docs(App); string ext = "rvt"; docs.GetFiles(DialogForms.SourcePath, ext); docs.DirIterate(DialogForms.SourcePath, ext); FileList = docs.FileFullNames_Filtered; if (FileList.Count == 0) { System.Windows.MessageBox.Show("No files found!"); return; } ProjectFilesList = new ProjectFilesList(FileList); ProjectFilesList.Show(); }