using System;

​

class Test

{

    public int Prop { get; }

    public Test()

    {

        Prop = 10;

    }

    public void Mutator()

    {

        // compile error

        // Prop = 1;

    }

}

public class Program

{

    public static void Main()

    {

        var t = new Test();

        // compile error

        // t.Prop = 2;

        Console.WriteLine(t.Prop);  // 10

    }

}