| CrossOriginResourceSharingHeaders | Provides a class to provide Cross Origin response headers for when communicating with a browser. |
| HttpHeaderCollection | Represents an collection of HTTP headers with their name and values. |
| MultipartFormCollection | Represents an class which hosts an multipart form data contents. |
| MultipartObject | Represents an multipart/form-data object. |
| StringKeyStoreCollection | Represents a collection of string keys associated with multiple string values. |
| StringValueCollection | Represents an collection of StringValue. |
| TypedValueDictionary | Represents the base class for storing and retriving data by their type. |