When I try to create a C# web application (page witha a button) it compiles
in the IDE error free but when I run it in the browser i get the following
error:

CS1595: 'System.Runtime.CompilerServices.CompilerGlobalScopeAttribute' is
defined in multiple places; using definition from
'C:\winnt\microsoft.net\framework\v1.0.3705\mscorlib.dll'

I have not addded any addition references. I have reinstalled both VS and
IIS to no avail. ASP projects created in VB are ok.

Any help would be welcome.

Thanks,
 Selwyn

Are you have a directive in the aspx witch as something like this :

--
--------------------------------------------------------
Rui Maia
*********************************

*********************************
WEB: http://mega.ist.utl.pt/~rfpm
-----------------------------------------------------

Also, check that the ASPNET account has "list folder/read data" permissions
on the root of the systemdrive, and that it has the appropriate read and
readwrite permissions to the framework folders.

Arild

Is it this?

PRB: "Compiler Error Message: CS1595" Error Message When You Use the C#
Compiler to Compile an ASP.NET Resource (Q318274)

http://support.microsoft.com/search/preview.aspx?scid=kb;en-us;Q318274

When I try to create a C# web application (page witha a button) it compiles
in the IDE error free but when I run it in the browser i get the following
error:

CS1595: 'System.Runtime.CompilerServices.CompilerGlobalScopeAttribute' is
defined in multiple places; using definition from
'C:\winnt\microsoft.net\framework\v1.0.3705\mscorlib.dll'

I have not addded any addition references. I have reinstalled both VS and
IIS to no avail. ASP projects created in VB are ok.

Any help would be welcome.

Thanks,
 Selwyn

Thanks guys - this article shows 2 ways to solve the problem - I have used
method 2

http://support.microsoft.com/search/preview.aspx?scid=kb;en-us;Q318274

Thanks again