我需要在string中找到匹配的GUID Regex
string findGuid="hi sdkfj 1481de3f-281e-9902-f98b-31e9e422431f sdfsf 1481de3f-281e-9902-f98b-31e9e422431f"
var guid = Regex.Match(m.HtmlBody.TextData, @"^(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}$").Value;