Distinct with custom comparer

Trying to use Distinct() using a custom comparer and it gives me the error:

cannot be inferred from the usage. Try specifying the type arguments explicitly

The Default comparer works fine but doesn't give the results I expect of course. How can I fix this?

public class TimeEntryValidation
{
    public string EmployeeID { get; set; }
    public string EmployeeLocation { get; set; }
    public string EmployeeDepartment { get; set; }
    public int RowIndex { get; set; }
}

public class MyRowComparer : IEqualityComparer<TimeEntryValidation>
{
    public bool Equals(TimeEntryValidation x, TimeEntryValidation y)
    {
        return (x.EmployeeDepartment == y.EmployeeDepartment && x.EmployeeLocation == y.EmployeeLocation);
    }

    public int GetHashCode(TimeEntryValidation obj)
    {
        return obj.Empl开发者_如何学JAVAoyeeID.GetHashCode(); 
    }
}

void Query(List<TimeEntryValidation> listToQuery)
{
    var groupedData =
        from oneValid in listToQuery
        group oneValid by oneValid.EmployeeID
            into g
        where g.Count() > 1
        select new {DoubleItems = g};
    var listItems = groupedData.Distinct(new MyRowComparer());
}

The type of groupedData is some IEnumerable<{an anonymous type}> whereas MyRowComparer is IEqualityComparer<TimeEntryValidation>

It's unclear whether you intended listItems to be a list of groups, or whether you wanted the actual items themselves.

If it's the latter, you probably want something like this:

void Query(List<TimeEntryValidation> listToQuery)
{
    var groupedData = from oneValid in listToQuery
                        group oneValid by oneValid.EmployeeID
                            into g
                            where g.Count() > 1
                            select  g ;
    var listItems = groupedData.SelectMany(group => group).Distinct(new MyRowComparer());
    //listItems is now an IEnumerable<TimeEntryValidation>
}