Antlr4.Runtime.Misc.IntervalSet.ToString C# (CSharp) Method

        public override string ToString()
        {
            return ToString(false);
        }

 public void TestIsolatedElements()
 {
     IntervalSet s = new IntervalSet();
     s.Add(1);
     s.Add('z');
     s.Add('\uFFF0');
     String expecting = "{1, 122, 65520}";
     Assert.AreEqual(s.ToString(), expecting);
 }