type experriment, C#

Language: Layout:

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public interface IBase {
        void tst();
    }
    public interface IOther {
        void tst2();
    }
    public class MyClass : IBase {
        public void tst() { }
    }
    public class Program
    {
        static void print(string fmt, params object[] args) { Console.WriteLine(fmt, args); }
        public static void Main(string[] args)
        {
            //Your code goes here
            print("Hello, world!");
            var ba = new byte[10];
            var ba2 = new byte[]{1,2,4};
            var l = new List<byte>();
            var s = "test";
            var i = 123;
            var b = (byte)123;
            
            print("ba : {0} {1} {2} {3} {4} {5}", ba  is byte[], ba  is ICollection<byte>, ba  is IList<byte>, ba  is IEnumerable<byte>, ba  is int, ba  is byte);
            print("ba2: {0} {1} {2} {3} {4} {5}", ba2 is byte[], ba2 is ICollection<byte>, ba2 is IList<byte>, ba2 is IEnumerable<byte>, ba2 is int, ba2 is byte);
            print("l  : {0} {1} {2} {3} {4} {5}", l   is byte[], l   is ICollection<byte>, l   is IList<byte>, l   is IEnumerable<byte>, l   is int, l   is byte);
            print("s  : {0} {1} {2} {3} {4} {5}", s   is byte[], s   is ICollection<byte>, s   is IList<byte>, s   is IEnumerable<byte>, s   is int, s   is byte);
            print("i  : {0} {1} {2} {3} {4} {5}", i   is byte[], i   is ICollection<byte>, i   is IList<byte>, i   is IEnumerable<byte>, i   is int, i   is byte);
            print("b  : {0} {1} {2} {3} {4} {5}", b   is byte[], b   is ICollection<byte>, b   is IList<byte>, b   is IEnumerable<byte>, b   is int, b   is byte);
            
            var x= new MyClass();
            print("t={0}, if.t={1}, cl.t={2}", x.GetType().Name, typeof(MyClass).GetType().Name, typeof(IBase).GetType().Name);
            print("i=m: {0},  m=i: {1}", typeof(IBase).IsAssignableFrom(typeof(MyClass)), typeof(MyClass).IsAssignableFrom(typeof(IBase)));
            print("o=m: {0},  m=o: {1}", typeof(IOther).IsAssignableFrom(typeof(MyClass)), typeof(MyClass).IsAssignableFrom(typeof(IOther)));
            print("i=x: {0},  o=x: {1}", typeof(IBase).IsAssignableFrom(x.GetType()), typeof(IOther).IsAssignableFrom(x.GetType()));
            print("x is i: {0},  x is o: {1}", x is IBase, x is IOther);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 13 Mb, average nr of threads: 3