How can I create a singleton IEnumerable?

Question

Does C# offer some nice method to cast a single entity of type T to IEnumerable?

The only way I can think of is something like:

Answer 1

Your call to AsEnumerable() is unnecessary. AsEnumerable is usually used in cases where the target object implements IQueryable but you want to force it to use LINQ-to-Objects (when doing client-side filtering on a LINQ-compatible ORM, for example). Since List implements IEnumerable but not IQueryable, there's no need for it.

Anyway, you could also create a single-element array with your item;

IEnumerable enumerable = new[] { t };

Or Enumerable.Repeat

IEnumerable enumerable = Enumerable.Repeat(t, 1);