Adding SPUtility Mail Headers TO,CC,BCC

Using Following Code you can send mail TO,CC,BCC

StringDictionary headers = new StringDictionary();

headers.Add("to", sendTo);
headers.Add("cc", "");

headers.Add("bcc", "");
headers.Add("from", "admin@test.com");
headers.Add("subject", "Testing");
headers.Add("content-type", "text/html");
SPUtility.SendEmail(web,headers, Body);