private void Change_TasksState()
{
var count = TasksList.Where(t => t.IsDone == false).Count();
if (count != 0)
{
TasksStateString = NotCompleted + count;
LabelBackGround = "Red";
}
else
{
TasksStateString = AllDone;
LabelBackGround = "Green";
}
ForeGround = "white";
}