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);
}