Csharp 非安全代码

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

            try
            {

                unsafe
                {

                    fixed (char* a = "12345\0".ToCharArray())
                    {

                        char[] c = new char[];
                        for (int i = ; i < ; i++)
                        {
                            c[i] = a[i];
                        }

                        Console.Out.WriteLine(c);
                    }
                }

            }
            catch (Exception eee)
            {

                Console.Out.WriteLine(eee.Message);
            }

            }

    }
}