public static void Attach(this IList<IAttributeDefinition> attributes,
		                          string attributeName,
		                          bool excludeFromNameSearch) {
			if(!string.IsNullOrEmpty(attributeName)) {
				var definition =
					attributes.FirstOrDefault(a => string.Equals(a.Name, attributeName, StringComparison.InvariantCultureIgnoreCase));
				if(definition != null) {
					attributes.Remove(definition);
				}
				definition = new AttributeDefinition(attributeName, excludeFromNameSearch);
				attributes.Add(definition);
			}
		}
		public void FindUsersByName_OneUserAttributeThatShallBeIncludedInSearchConfigured_SearcherHasUserFilterWithAttributeForSearch() {
			var searcher = A.Fake<IDirectorySearcher>();
			
			A.CallTo(() => ldapConfig.Users.Filter).Returns("usersfilter");
			A.CallTo(() => ldapConfig.Users.RdnAttribute).Returns("rdnattribute");

			var attribute1 = new AttributeDefinition("includedInSearch", false);
			var attribute2 = new AttributeDefinition("excludedInSearch", true);
			var attributes = new List<IAttributeDefinition>();
			attributes.Add(attribute1);
			attributes.Add(attribute2);

			A.CallTo(() => ldapConfig.Users.Attributes).Returns(attributes);

			A.CallTo(() => searcherFactory.CreateSearcher(A<IEntry>.Ignored, SearchScope.Subtree, ldapConfig.Users)).Returns(searcher);

			int totalRecords;
			adapter.FindUsersByName("username", 0, 1, out totalRecords);

			Assert.AreEqual("(&usersfilter(|(rdnattribute=username)(includedInSearch=username)))", searcher.Filter);
		}