Linq SUM on objects?

Question

I\'ve an object that represent a business data.

Basically, it\'s an object agregating some totals:

public class MyClass{
   public double MyDataOne {         


        

Answer 1

In order to use Sum you should provide Func delegate, where ### is int, long, float, double, decimal or their nullable counterparts. So you are not able to use MyClass in the way you want.

All overloads of Sum method returns primitive types that I mentioned above. That's why it doesn't make sense to sum custom object while returning type is not a number but custom object too.