score:3
Accepted answer
Method Syntax
var query = enumerable.OrderBy(x => x.order == null ? 1 : 0).ThenBy(x => x.order);
Query Syntax
var query = from x in enumerable
orderby (x.order == null ? 1 : 0), x.order
select x;
score:0
Assuming order is a nullable value (not an object), you should be able to use this:
orderby null == order ? 1 : 0, order
If it is an object, you could try
orderby null == order ? 1 : 0, order.PropertyName
Source: stackoverflow.com
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