private void wmtxtSearchbox_TextChanged(object sender, EventArgs e) { if (String.IsNullOrWhiteSpace(wmtxtSearchbox.Text)) { ForSelectedJiraProjects.Clear(); if (SearchSource != null) { foreach (var project in SearchSource) { ForSelectedJiraProjects.Add(project); } } } else { var condition = SearchSource.Where(o => o.Name.ToLower().Contains(wmtxtSearchbox.Text.ToLower())).ToList(); ForSelectedJiraProjects = condition; } RebindingForSelectedDataSource(); }