Calling VB Based SQLCLR Function Failed With Error Can't Load System.Web Assembly

I created a CLR function based on following VB code:



Imports Microsoft.SqlServer.Server

Public Partial Class SqlClrVB

<Microsoft.SqlServer.Server.SqlFunction()> _

Public Shared Function GetTotalPhysicalMemory() As Integer

GetTotalPhysicalMemory = My.Computer.Info.TotalPhysicalMemory

End Function

End Class



The VB code was complied into a DLL called totalmem.dll and call following TSQL to map it into a SQL function:



create assembly totalmem from '!WORKINGDIR! otalmem.dll'

WITH PERMISSION_SET=UNSAFE

go

create function fnGetTotalMem()

returns int

as external name totalmem.SqlClrVB.GetTotalPhysicalMemory

go



When I call this function, it returned following error:

select dbo.fnGetTotalMem()



Msg 6522, Level 16, State 2, Line 0

A .NET Framework error occurred during execution of user defined routine or aggregate 'fnGetTotalMem':

System.IO.FileNotFoundException: Could not load file or assembly 'System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

System.IO.FileNotFoundException:

at Microsoft.VisualBasic.MyServices.Internal.ContextValue`1.get_Value()

at My.MyProject.ThreadSafeObjectProvider`1.get_GetInstance()

at SqlClrVB.GetTotalPhysicalMemory()

.



Anyone knows why I'm hitting this error? I didn't reference any System.Web interface why it needs to load System.Web assembly? The same code runs OK if I compile it as a separate VB application out side of SQL Server 2005.



Thanks much,



Zhiqiang