Expression<Func<bool>> e1 = () => true;
            Func<bool> e2 = () => false;

 class Base
        {
             
        }

        private class MyClass : Base
        {

        }
  private static void Main(string[] args)
        {
            Base b=new MyClass();
        }

int res;

var u = 654654u;

   public class Test
        {
             public long Value { get; private set; }

            public Test(long value)
            {
                Value = value;
            }

            public static implicit operator DateTime(Test t)
            {
                return new DateTime(t.Value);
            }

            public static implicit operator int(Test t)
            {
                return (int) t.Value;
            }
        }
        private static void Main(string[] args)
        {
            Test t = new Test(654987654);
            DateTime dt = t;
        }