using System;

public class Program

{

public static void Main()

{

    var xAsStruct = new Foo{

        A=1,

        B=2

    };

    var yAsStruct = xAsStruct;

    xAsStruct.A = 3;

    Console.WriteLine($"Struct:   x:{xAsStruct}, y:{yAsStruct}");

    var xAsClass = new Bar{

        A=1,

        B=2

    };

    var yAsClass = xAsClass;

    xAsClass.A = 3;

    Console.WriteLine($"Class:    x:{xAsClass}, y:{yAsClass}");

}

​

struct Foo {

    public int A;

    public int B;

    public override string ToString()

    {

        return $"{{A:{A},B:{B}}}";

    }

}

​

​

class Bar

{

    public int A { get; set;}

    public int B { get; set;}

    public override string ToString()

    {

        return $"{{A:{A},B:{B}}}";

    }

}

​

}