linq group not working in gridview

Hello All,

I have a table called ResourceMaster containing EmployeeID as primary key, ReportingMgr along with many other column.

I want to fetch the records group by the reporting manager.

Here is my query :

var MyUsers = from users in DC.GetTable<ResourceMaster>()
group users by users.ReportingMgr into MyGroup
orderby MyGroup.Key
select MyGroup;
Gridview1.DataSource = MyUsers;
Gridview1.DataBind();

But I am getting an error " A field or property named 'Key' is not found"..

Any reply is appreciated.

Cheers,
Dipankar