public static void IfCollectionContainsNull <T>(
[CanBeNull, AssertionCondition(AssertionConditionType.IS_NOT_NULL)] IEnumerable <T> collection,
[NotNull] string collectionName) where T : class
{
Fail.RequiresCollectionName(collectionName);
Fail.IfArgumentNull(collection, nameof(collection));
Fail.IfTrue(collection.Contains(null), "Collection '{0}' contains null", collectionName);
}
