麻烦帮我把这段VBscript翻译成C#的代码。（马上给分）

[sundotnet]

Imports System.Web.Security
Sub btnname_click(ByVal s As Object, ByVal e As EventArgs)
lbname.Text = EncryptPassword(txtname.Text, "md5")
Response.Write("br" & EncryptPassword(txtname.Text, "sha1"))
End Sub

Function EncryptPassword(ByVal password As String, ByVal passwordformate As String)
If passwordformate = "sha1" Then
EncryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "sha1")
ElseIf passwordformate = "md5" Then
EncryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "md5")
Else
EncryptPassword = ""
End If
End Function

[sin360]

using System.Web.Security;

void btnname_click(Object s , EventArgs e )
{
lbname.Text = EncryptPassword(txtname.Text, "md5")
Response.Write("br" & EncryptPassword(txtname.Text, "sha1"))
}

void EncryptPassword(String password ,string passwordformate)
{
if(passwordformate == "sha1")
{
EncryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "sha1");
}else if( passwordformate == "md5"){
EncryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "md5");
}else{
EncryptPassword = "";
}}

[quakecs]

C#中字符串的连接好像不可以用“&”.