public static Task <TResult> SingleOrDefaultAsync <TSource, TResult>(
this SingleQueryable <TSource> source, Expression <Func <TSource, TResult> > selector,
CancellationToken token = default(CancellationToken))
{
#if !NOASYNC
var executor = GetProviderExecutor(source.Queryable.Provider);
if (executor != null)
{
return(executor.SingleOrDefaultAsync(source.Queryable.Select(selector), token));
}
#endif
return(GetTask(() => source.Select(selector).SingleOrDefault(), token));
}
public static Task <TSource> SingleOrDefaultAsync <TSource>(
this SingleQueryable <TSource> source,
CancellationToken token = default(CancellationToken))
{
#if !NOASYNC
var executor = GetProviderExecutor(source.Queryable.Provider);
if (executor != null)
{
return(executor.SingleOrDefaultAsync(source.Queryable, token));
}
#endif
return(GetTask(source.SingleOrDefault, token));
}
