delegate int F();

class Program
{
    static void Foo(bool b)
    {
        F f;
        if (b) f = delegate { return 0; };
        else f = delegate { return 1; };
    }
}

        // error CS0173: Type of conditional expression cannot be determined because there is no implicit conversion between 'anonymous method' and 'anonymous method'
        f = b ? delegate { return 0; } : delegate { return 1; };

        f = b ? (F) delegate { return 0; } : delegate { return 1; };