vs c# 突然灾难性故障

窗体改了个地方突然就故障了，然后把修改的地方删掉了也没用，修改地方的代码单拿出来也是对的

        if (radioButton1.Checked == true)
        {
            this.Hide();
            consumer frm2 = new consumer();
            frm2.Show();
        }
        else if (radioButton2.Checked == true)
        {
            boss frm3 = new boss();
            frm3.Show();
            this.Hide();
        }
        else
        {
            string m = "请正确选择身份！";
            MessageBox.Show(m, "提示");
        }

第一请重新注册.net，方法如下︰

To repair IIS mappings for ASP.NET you must register Aspnet_isapi.dll. To do so:
1. Click Start and then click Run.
2. Type regsvr32 <Windows folder>\Microsoft.NET\Framework\v1.0.3705\aspnet_isapi.dll and then click OK. Regsvr32 will return the results of the registration.

如果還不可以，請把AspNet這個User加入到Administrator中間去！