using System;

​

public interface In1

{

    int MyProperty { get; }

​

    bool Check { get; }

}

​

class TestProp : In1

{

    // use a ternary

    public int MyProperty => Check ? 1 : 0;

​

    // or a Lazy, if you want to emulate Scala

    public int MyOtherProperty => 

        new Lazy<int>(() => { if (Check) return 1; else return 0; }).Value;

​

    public bool Check => true;

}