/// <summary>
/// Run asynchroniously to not stop XrmToolBox.
/// </summary>
private void OnIndexChanged(CheckedListBox listBox)
{
// Prevent from further clicking
this.SetAllEnable(false);
// Uncheck everything
listBox.ClearAllSelections();
// Set as checked only checked item
listBox.SetItemCheckState(listBox.SelectedIndex, CheckState.Checked);
// Checked User
var userIndex = listBox.SelectedIndex;
// Checked Model connected with User
CurrentSelectedUser = this.Users.ElementAt(userIndex);
// Calculate permissions for selected User
CalculatePermissions();
// After everything enable - enable Roles for future plans
this.SetAllEnable(true);
}