List.Contains is not working as hoped

Question

If I have an object of type MyBull and a List orig:

// Just an example
MyBull x = getMeTheObjectWithIdFromDB(9);

ori         


        

Answer 1

Does your MyBull object implement IEquatable.Equals? This method will determine the equality of two objects

requested by OP

Your MyBull class would implement IEquatable

public class MyBull : IEquatable

and then you would need to override the Equals method

public bool Equals(MyBull theOtherMyBull)

As David Neale mentions below, this is best used when you're comparing objects of the same type--which you are. Overriding Object.Equals and Object.GetHashCode will work too.