Checking for duplicates in a List of Objects C#

Question

I am looking for a really fast way to check for duplicates in a list of objects.

I was thinking of simply looping through the list and doing a manual comparison th

Answer 1

Do a select distinct with linq, e.g. How can I do SELECT UNIQUE with LINQ?

And then compare counts of the distinct results with the non-distinct results. That will give you a boolean saying if the list has doubles.

Also, you could try using a Dictionary, which will guarantee the key is unique.