How do I replace cid: filepath and remove everything else in this statement

[clillefield]

"cid:image002.j pg@01CDC1B4.022 86C10"> this is the statement. All characters after @ are random and need to be removed. I want to replace cid:image002.jp g and remove all after @ and before>.

[Mikkeee]

string longFileName = "cid:image002.jpg@01CDC1B4.02286C10";
string shortFileName = longFileName.Substring(0, longFileName.IndexOf("@"));