Const, C# - rextester

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//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 class Program
    {
        const int x=10;   //value must be initialized
        const int y=100;
        int j=101;
        public Program()
        {
          const int  x=y; //no error, x changed to 100;
            
          const int z=x+y;  // no error, both x and y must define with const. we get error when any of x or y non const to assign const z
          const int i=j;  // error, here j is not const,it's only with int data type but i can take value from only const.
            int k=y; // no error, here y is const to assign int data type k varaible.
            Console.WriteLine("x: " + x);
          Console.WriteLine("z: " + z);
            //Console.WriteLine("i :" + i);
            Console.WriteLine("k: " + k);
        }
        public Program(int xyz)   //error, because const can take values only when declaration not at runtime.
        {
             const x=xyz;   
            Console.WriteLine(x);
        }
        public static void Main(string[] args)
        {
            //Your code goes here
            Console.WriteLine("Hello, world!");
            Program p=new Program();
            Program p1=new Program(101);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,13 sec, cpu time: 0,11 sec, average memory usage: 15 Mb, average nr of threads: 3, absolute service time: 0,3 sec