Restricted property value to list

If you want to be able to set the value of your property to only a set of predefined values at compile-time you could specify the type of the property as an enum:

public enum MyType
        {
            ValidValueOne,
            ValidValueTwo
        }

        public class YourClass
        {
            public MyType MyProperty { get; set; }
        }

If you want to restrict the values at run-time you could implement some logic in the setter of the property, e.g:

public class YourClass
        {

            private string _s;
            public string MyProperty
            {
                get { return _s; }
                set 
                {
                    if (value != "validvalue1" && value != "valuedvalue2")
                        throw new InvalidOperationException("invalid value");

                    _s = value;
                }
            }
        }

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