| Overload | Description | 
|---|---|
| Union<TSource>(IEntityQuery<TSource>,IEnumerable<TSource>) | Produces the set union of two sequences. | 
| Union<TSource>(IEntityQuery<TSource>,IEnumerable<TSource>,IEqualityComparer<TSource>) | Produces the set union of two sequences. | 
Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family