OverloadingConstructors.cs

    public class New
    {

        private iFoo _Foo;
        public string PropertyName { get; set; }
        public string PropertyValue { get; set; }

        public New(iFoo foo) : this(foo, string.Empty){}
        public New(iFoo foo, string propertyName) : this(foo, propertyName, string.Empty) { }
        public New(iFoo foo,string propertyName, string propertyValue)
        {
            _Foo = foo;
            PropertyName = propertyName;
            PropertyValue = propertyValue;
        }
    }