哪里不对。。？？？

Question

 protected void btn_Login_Click(object sender, EventArgs e)

    {

        string user = txt_UserName.Text.Trim();

        string pass = txt_UserPassword.Text.Trim();

        if( user ==  "admin"&& pass = = "123456");

          lbl_Result .Text = "登陆成功!";

       else 

          lbl_Result .Text ="登陆失败!";

    }

Answer 1

if后面为何要有分号，==中间为何要有空格