Pattern for exposing non-generic version of generic interface

Question

Say I have the following interface for exposing a paged list

public interface IPagedList
{
    IEnumerable PageResults { get; }
    int Current         


        

Answer 1

Define two interfaces, first

    public interface IPageSpecification
    {
        int CurrentPageIndex { get; }
        int TotalRecordCount { get; }
        int TotalPageCount { get; }        
        int PageSize { get; }
    }   

public interface IPagedList : IPageSpecification
{
    IEnumerable PageResults { get; }
}   

As you see, IPagedList is derived from IPageSpecification. In your method, only use IPageSpecification as parameter. In other cases, IPagedList - implementers of IPagedList would also contain data from IPageSpecification