private void OnIssueCategorySelected(object sender, EventArgs e) { //Event handler for change in issue category this.mIssueTypes.Clear(); this.mIssueTypes.Merge(CustomerProxy.GetIssueTypes(this.cboIssueCategory.SelectedValue.ToString())); this.cboIssueType.SelectedIndex = -1; OnValidateForm(null, EventArgs.Empty); }