public?class?ReplaceTagsFilter?:?MemoryStream
{
????private?readonly?Stream?_response;
????public?ReplaceTagsFilter（Stream?response）
????{
????????_response?=?response;
????}

????public?override?void?Write（byte[]?buffer?int?offset?int?count）
????{
????????var?html?=?Encoding.UTF8.GetString（buffer）;
????????html?=?ReplaceTags（html）;
????????buffer?=?Encoding.UTF8.GetBytes（html）;
????????_response.Write（buffer?offset?buffer.Length）;
????}

????private?string?ReplaceTags（stri