“Interface not implemented” when Returning Derived Type

Question

The following code:

public interface ISomeData
{
    IEnumerable Data { get; }
}

public class MyData : ISomeData
{
    private List

        

Answer 1

You could implement like this:

public class MyData : ISomeData
{
    private List m_MyData = new List();
    public IEnumerable Data { get { return m_MyData; } }
}