Cannot convert from List to List

Question

I\'m trying to pass A list of DerivedClass to a function that takes a list of BaseClass, but I get the error:

cannot convert from 
         


        

Answer 1

It is because List is in-variant, not co-variant, so you should change to IEnumerable which supports co-variant, it should work:

IEnumerable bcl = new List();
public void doSomething(IEnumerable bc)
{
    // do something with bc
}

Information about co-variant in generic