LINQ OR query

I am trying to run a query as below, but not having any joy and am getting "the method or operation is not implemented". Have I missed something, or is this not possible  ?

  public IList<Supplier> GetAllSuppliers(bool enabledOnly)
        {
           return Instance.Suppliers.Where(s => s.Enabled == enabledOnly || enabledOnly == false).OrderBy(s => s.SupplierName).ToList();
        }

The equivalent SQL below is what I'm after, where if @enabledOnly is false, everything is returned, whereas if it is true, only rows where the Enabled field = True are returned.

DECLARE @enabledOnly bit

SET @enabledOnly = 0

SELECT * FROM Supplier

WHERE (Enabled = @enabledOnly OR @enabledOnly = 0)

I can easily put the condition outside the actual query and have two queries as below, but was trying to be a bit more compact.

if (enabledOnly)
            {
                return Instance.Suppliers.Where(s => s.Enabled == true).OrderBy(s => s.SupplierName).ToList();
            }
            else
            {
                return Instance.Suppliers.OrderBy(s => s.SupplierName).ToList();
            }

Cheers

Paul

This looks like a bug in our handling of "enabledOnly == false" -- LINQ is asking LightSpeed to construct a query expression from a local variable and a literal value, but LightSpeed only knows how to construct query expressions around columns (entity properties).

You can get the effect you want in a single query as follows:

Instance.Suppliers.Where(s => (s.Enabled == true) || (s.Enabled == enabledOnly)).OrderBy...