常量中有换行符

[panpanyou]

我才开始学习C#，，在自己做一个QQ登录，需要连接到数据库ACCESS，，，登录的我已经做好了，可是这个注册新用户，也就是插入数据到原表中，就会提示下面的错误。。。。。这是怎么回事啊？？
怎么改呢？？？

string insert = "insert into 登录（账号，密码）values(";
insert += "'" + this.textBox1.Text + "',";
insert += "'" + this.textBox3.Text + "'," )";

G:\c#\QQ登录系统\ff\Form3.cs(34,56): 错误 CS1010: 常量中有换行符

[q107770540]

string insert = "insert into 登录（账号，密码）values(‘";
insert += this.textBox1.Text + "','";
insert += this.textBox3.Text + "')";

[q107770540]

string insert = "insert into 登录（账号，密码）values('"+ this.textBox1.Text + "','"+ this.textBox3.Text + "')";

[兔子-顾问]

string insert = "insert into 登录（账号，密码）values(";
insert += "'" + Regex.Replace(this.textBox1.Text,@"[\r\n]","") + "',";
insert += "'" + Regex.Replace(this.textBox3.Text,@"[\r\n]","") + "'," )";

[wuyq11]

string insert = "insert into 登录（账号，密码）values(";
insert += "'" + this.textBox1.Text.Replace("\r\n","") + "',";
insert += "'" + this.textBox3.Text + "')";
oledbparameter操作