Getting A User's Information Is Based On An E-mail Is Stored As A Text

SPList UserInfoList = site.SiteUserInfoList;

                                        string useremail = oOpenItem["UserEmailAddress"].ToString();

                                   

                                      

                                   

                                        SPQuery query = new SPQuery();

                                        query.ViewFields = "";

                                        query.Query = "" + assigneeusername + "";

                                    

                                        SPListItemCollection UserItems = UserInfoList.GetItems(query);

                                       

                                        if (UserItems != null)

                                        {

                                            SPListItem UserItem = UserItems[0];

                                            strDept = UserItem["Department"] == null ? "No Department" : UserItem["Department"].ToString();

                                        }

                                        else

                                        {

                                            myLog.WriteEntry(assigneeusername + "Not Found");

                                        }

                                    }

                                    else

                                        strDept = string.Empty;

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