public static void Add <T>(this IGrouping <T> grouping, IEnumerable <T> members) where T : IGroupable <T>
{
foreach (var member in members)
{
grouping.Add(member);
}
}
public static void Add <T>(this IGrouping <T> grouping, params T[] members) where T : IGroupable <T>
{
var count = members.Length;
for (int i = 0; i < count; i++)
{
grouping.Add(members[i]);
}
}