public void SetRolesOnUser(string roleNamesCommaSeparated, string userId) { List <string> roleNames = new List <string>(); if (roleNamesCommaSeparated != null && roleNamesCommaSeparated.Length > 0) { roleNames = new List <string>(roleNamesCommaSeparated.Split(',')); } ApplicationRole.SetRolesOnUser(roleNames, userId, userManager); }