public static TSource First <TSource>(this IEnumerable <TSource> source, Func <TSource, bool> predicate)
{
TSource first = source.TryGetFirst(predicate, out bool found);
if (!found)
{
ThrowHelper.ThrowNoMatchException();
}
return(first);
}
public static TSource Single <TSource>(this IEnumerable <TSource> source, Func <TSource, bool> predicate)
{
TSource?single = source.TryGetSingle(predicate, out bool found);
if (!found)
{
ThrowHelper.ThrowNoMatchException();
}
return(single !);
}
