A sample C# file that messes with syntax highlighters

AwfulCSharpCode.cs

extern alias b;
using System;
class A { public dictionary<int, String> func(int a) { } }
struct hi { byte q; int a = /* */ 1; char c = 'c'; }
void A() { }
#if ABC // Testing
#endif
/* Mult-line
   comment */
public abstract class Outside { }
namespace A.B {
    /// <xml a="b">comment</xml>abc
    using Inside.Namespace;    using /* */ static /* */ Inside.Namespace; // 123
    using /* */ Aliased /**/ =/**/ Inside.Namespace;
    enum A { Test = 1+1, [Good("" /* Sure */)]Test2 = 2l } interface ISomething { }

    class A : B // Ok
    {
    }

    [Attribute(@"ABC", typeof(G))]
    private /* OK */ class Inside<T1, T2> where T1:int // Hi
      {
        struct hi {
          byte q; //(
        }
        extern int[] a=new Bob[0];
        public readonly Nullable<String, int> Field = "A\t";
        public string AutoProperty { get; set; } = "https://ok";
        public override int GetterOnly { get; } = 123f;

        private Nullable<String, bool> Method<T>(out char[] a) where T:class {
            var a=1;
            Func<int?, int> f = (a, b) => a.Add(int.parse('a'));
        }

        ISomething NotGeneric<T>(int? a, Nullable<String> b) => (ISomething)b;

        String message = $@"{name} exclaimed ""Hello, world!""";
    }

    internal static partial struct Inside2 { }
}

class Program
{
    static void Main([Something("")]string A[], int b)
    {
        //string is highlighted
        var s = "MyClass";

        //MyClass IS now highlighted
        IMyClass myClass = new MyClass();
    }
}