private void AddRepository()
        {
            var newFolder = new AddNewRepository();

            newFolder.ShowDialog();
            if (!string.IsNullOrEmpty(newFolder.FolderName))
            {
                RepositoriesListCollection.Add(new Repository {
                    RepositoryName = newFolder.FolderName
                });
            }
        }
 private void DeleteRepository()
 {
     RepositoriesListCollection.Remove(SelectedFolder);
 }