Question

I have an interface with:

IList<int> CategoryIDs {get;set;}

Then a class that inherits this interface:

public IList<int> CategoryIDs
{

     get {}  // this part works
     set { _categoryIDs = value;   // error!

}

The set part of the accessor reports an error:

cannot implicity convert type IList<int> to List<int>.

What should I do? confused.

Answer 1

You can instantiate and assign a List just fine with a minor tweak:

private IList<int> _categoryIDs; // use IList instead of List
public IList<int> CategoryIDs
{

     get { return _categoryIDs; }
     set { _categoryIDs = value; }

}