public void FormatTest1() { MutableString mutableString = new MutableString(128); short[] sValues = { Int16.MinValue, -27, 0, 1042, Int16.MaxValue }; Console.WriteLine("{0,10} {1,10}", "Decimal", "Hex"); foreach (short v in sValues) { mutableString.Format("{0,10:G}: {0,10:X}", v); string systemString = String.Format("{0,10:G}: {0,10:X}", v); Console.WriteLine($"{mutableString}=={systemString}"); Assert.That(mutableString == systemString); } }