LINQ runtime OrderBy

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C#

LINQ

I have a List<MyObjecT> that I would like to be able to sort at run-time. I wanto to do this, without the giant IF statement

private List<Customer> SortCustomer(string sortBy, string sortOrder)
{
   // obviously I get this from a service in the real code
   var myList = new List<Customer>();

   if (sortBy == "firstname" && sortOrder == "asc") {
       return myList.OrderBy(x => x.FirstName);
   } else if (sortBy == "firstname" && sortOrder == "desc") {
       return myList.OrderByDesc(x => x.firstName);
   } else if ..... // you get the idea

}

I can't sort in the database easily (one of the fields is a decimal stored as string, another is a lookup field, but there's no lookup table so in the database it is just an int field with no reference. I didn't want to deal with trying to convert the db fields as necessary to sort.

I also can't use the Dynamic Linq Library, just to make things more complicated.

Any ideas?

Thanks,
Andrew