| IdeaBlade.EntityModel.Compat Assembly > IdeaBlade.EntityModel.Compat Namespace > EntityScalarQueryAsyncExtensions Class : SingleOrDefault Method |
| Overload | Description |
|---|---|
| SingleOrDefault(IEntityScalarQuery,Action<EntityScalarQueryOperation>,Object) | Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. |
| SingleOrDefault<TSource>(IEntityScalarQuery<TSource>,Action<EntityScalarQueryOperation<TSource>>,Object) | Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. |
| SingleOrDefault(IEntityScalarQuery,IPredicateDescription,Action<EntityScalarQueryOperation>,Object) | Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. |
| SingleOrDefault<TSource>(IEntityScalarQuery<TSource>,Expression<Func<TSource,Boolean>>,Action<EntityScalarQueryOperation<TSource>>,Object) | Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. |
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2