Uncatchable exceptions in .NET

using System;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                StackOverflow();
                //AccessViolation();
            }
            catch
            {
                Console.WriteLine("Caught.");
            }
        }

        private static void StackOverflow()
        {
            StackOverflow();
        }

        private static unsafe void AccessViolation()
        {
            byte b = *(byte*) (8762765876);
        }

    }
}