lazy.cs

// context: http://stackoverflow.com/questions/11828780/lazyt-lazy-loading-error-a-field-initializer-cannot-reference-the-non-static/11828838?noredirect=1#comment72503092_11828838
using System;

class Program
{
    static void Main()
    {
        var obj = new MyType();
        for (int i = 0; i < 5; i++)
        {
            Console.WriteLine($"{i}: {obj.Value ?? "(null)"}");
        }
    }
}
class MyType
{
    private readonly Lazy<string> _foo;
    public string Value => _foo.Value;
    public MyType()
    {
        _foo = new Lazy<string>(() =>
        {
            Console.WriteLine("Lazy invoked");
            return null;
        });
    }
}