How to get User Email ID from Person or Group field of SharePoint List

using (SPSite oSite = new SPSite(SPContext.Current.Site.Url))
            {
                using (SPWeb oWeb = oSite.OpenWeb())
                {
                    SPList Olist= oWeb.Lists["EmplyoeeList"];

                    SPListItemCollection oItems = Olist.Items;
                    string TOEmailAdd = string.Empty;
                    foreach (SPItem oListItem in oItems)
                    {

                                               SPFieldUserValueCollection AssignedTo = (SPFieldUserValueCollection)oListItem["AllMgr"];

                        foreach (SPFieldUserValue uv in AssignedTo)
                        {

                      TOEmailAdd = TOEmailAdd +uv.User.Email + ";"; 

                        }

                TOEmailAdd = TOEmailAdd .TrimEnd(';');
              }
            }
   }