c# - 每次数据库恢复异常失败后如何处理数据库恢复失败并设置为多用户模式？

Question

这是我用来恢复数据库的代码

SqlConnection c = new SqlConnection("server=.\\SQLExpress;Persist Security Info= True;integrated security=True;Trusted_Connection=Yes");
                c.Open();
//Setting database into single user mode first
                SqlCommand cd = new SqlCommand("ALTER DATABASE Society_security_database SET SINGLE_USER WITH ROLLBACK IMMEDIATE", c);
                cd.ExecuteNonQuery();
//Restoring database from a location
                cd = new SqlCommand("RESTORE DATABASE Society_security_database FROM DISK = '" + path + "' WITH REPLACE", c);
                cd.ExecuteNonQuery();
//Finally setting it to MultiUSermode again
                cd = new SqlCommand("ALTER DATABASE Society_security_database SET MULTI_USER", c);
                cd.ExecuteNonQuery();
                SqlConnection.ClearAllPools();
                c.Close();

但是当恢复失败时，第三次查询没有执行，程序异常中止，如何解决这个问题？