C# struct, how to assign a null value?

Question

I have a list:

List<int, SomeStruct> 

For some reason, it is not allowing me to assign null values to it. What do I do if I want to have no struct associated?

Answer 1

Use nullable types:

List<int, SomeStruct?> 

You can't assign null to an element of the list because structs are value types, while null means an empty pointer, and so can only be assigned to reference type variables.

Also note that List as you're using it doesn't exist in .NET! Perhaps you want Dictionary?