SPSite site = SPControl.GetContextSite(Context);
SPWeb web = site.AllWebs[0];
SPFolderCollection AddFold = web.Folders ;
SPFileCollection destFiles = web.GetFolder("Lists/ContractDocument").Files;
HttpPostedFile file = f_Input.PostedFile
byte[] docby = new byte[file.ContentLength];
Stream fileStream=file.InputStream;
fileStream.Read(docby,0,file.ContentLength);
string desURL=web.GetFolder("Lists/ContractDocument").Url+"/test.doc";
destFiles.Add(desURL,test);