using System;

public class Program

{

    public class Foo

    {

        public decimal Bar;

    }

    public static void Main()

    {

        var max = 10.00M;

        var foo = new Foo() { Bar = 5 };

        if (foo?.Bar > max)

            Console.WriteLine($"{foo?.Bar} is too large. Max is {max}.");

        else

            Console.WriteLine($"Value is: {foo?.Bar}");

        foo.Bar = 12;

        if (foo?.Bar > max)

            Console.WriteLine($"{foo?.Bar} is too large. Max is {max}.");

        else

            Console.WriteLine($"Value is: {foo?.Bar}");

        foo = null;

        if (foo?.Bar > max)

            Console.WriteLine($"{foo?.Bar} is too large. Max is {max}.");

        else

            Console.WriteLine($"Value is: {foo?.Bar}");

    }

}