Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
When using the query operator Distinct() the types in the queried sequence must either provide suitable overloads of GetHashCode() and Equals() or you have to pass an implementation of IEqualityComparer<T>.
My question: Why is there no overload of Distinct() accepting a Delegate instance (e.g. Comparison<T>)? – If it was existent a more lighweight lambda expression could be passed (more lightweight than an implementation of IEqualityComparer<T>). – Am I missing something here?
Because it uses
GetHashCode().You cannot make a delegate that gives hash codes.
It could take two delegates, but that would be confusing.
It would be better to ask why there isn’t a
DistinctBy()method that takes a projection.