Delete User from Roles in DotnetNuke (DNN)

RoleInfo objRoleInfo = new RoleInfo();
RoleController objRoleController = new RoleController();
objRoleInfo = objRoleController.GetRoleByName(PortalId, “Pass Roll Name”);
objRoleController.DeleteUserRole(“Pass Portal ID”, “Pass UserID”, “Pass Role Id”);
Ex:
objRoleController.DeleteUserRole(PortalId, UserId, objRoleInfo.RoleID);