c# aspx.net Codebehind sorunu

Source Error:


Line 5:  
Line 6:  using System.Web;
Line 7:  using System.Web.Script.Serialization;
Line 8:  using System.Web.UI;
Line 9:  using System.Web.UI.WebControls;

C:\Windows\SysWOW64\inetsrv> "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /t:library /utf8output /R:"C:\Windows\assembly\GAC_MSIL\System.ServiceModel\3.0.0.0__b77a5c561934e089\System.ServiceModel.dll" /R:"C:\Windows\assembly\GAC_32\System.Data\2.0.0.0__b77a5c561934e089\System.Data.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.Runtime.Serialization\3.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll" /R:"C:\Windows\assembly\GAC_MSIL\System\2.0.0.0__b77a5c561934e089\System.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.IdentityModel\3.0.0.0__b77a5c561934e089\System.IdentityModel.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.Web.Services\2.0.0.0__b03f5f7f11d50a3a\System.Web.Services.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.Drawing\2.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll" /R:"C:\Windows\assembly\GAC_32\System.EnterpriseServices\2.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.Configuration\2.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll" /R:"C:\Windows\assembly\GAC_32\System.Web\2.0.0.0__b03f5f7f11d50a3a\System.Web.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.ServiceModel.Web\3.5.0.0__31bf3856ad364e35\System.ServiceModel.Web.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.Xml\2.0.0.0__b77a5c561934e089\System.Xml.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.WorkflowServices\3.5.0.0__31bf3856ad364e35\System.WorkflowServices.dll" /R:"C:\Windows\assembly\GAC_MSIL\System.Web.Mobile\2.0.0.0__b03f5f7f11d50a3a\System.Web.Mobile.dll" /R:"C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll" /out:"C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\18cd59b0\105e6967\App_Web_wzjawxrs.dll" /debug- /optimize+ /w:4 /nowarn:1659;1699;1701  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\18cd59b0\105e6967\App_Web_wzjawxrs.0.cs" "C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\18cd59b0\105e6967\App_Web_wzjawxrs.1.cs" "C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\18cd59b0\105e6967\App_Web_wzjawxrs.2.cs"


Microsoft (R) Visual C# 2005 Compiler version 8.00.50727.4927
for Microsoft (R) Windows (R) 2005 Framework version 2.0.50727
Copyright (C) Microsoft Corporation 2001-2005. All rights reserved.

e:\Studentsweb\081641\Personnel.aspx.cs(7,18): error CS0234: The type or namespace name 'Script' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)
e:\Studentsweb\081641\Personnel.aspx.cs(15,9): error CS0246: The type or namespace name 'JavaScriptSerializer' could not be found (are you missing a using directive or an assembly reference?)

Sanırsam anladıgım kadarıyla kullandıgım ftp Json desteklemıyor pekı nasıl kullanabılırım.

Uygulamana javascriptserializer'i referans olarak ekle.
C:\Program Files\Microsoft ASP.NET\ASP.NET 2.0 AJAX Extensions\v1.0.61025\System.Web.Extensions.dll
.Net versiyonunun en az 3.5 ve üstü olması gerekiyor.
Alternatif olarak json.net kullanabilirsin.

tamam ındırdım bin içine attım dll dosyalarını referans olarakta ekledım ama kodlar farklı sanırsam
JsonSerializer js = new JsonSerializer();
tanımladım ama
js.Serialize(h1); daha once classımı boyle atıyordum sımdı kı kodu bulamadım usagete

Ayriyetten Json.net verdıgınız lınkte 4.5 ındırdıgım zaman ıcınden .net20 binin attıgımdada olur dımı ?