Difference between Select and ConvertAll in C#

Question

I have some List:

List list = new List { 1, 2, 3, 4, 5 };

I want to apply some transformation to elements of my list.

Answer 1

I know this is bit late but i have still added because this could be of some use for others in future.

When using it in EntityFramework query expression it is not recommended to use ConvertAll() as it evaluates the expression rather than leaving it as expression for future use. This seriously degrades database query execution performance as it would have to make number of calls before evaluating final expression.