As a workaround you may use the table designer feature in SQL Server Management Studio 2008 to edit table schemas in SQL Server 2008.

Creating and editing table schemas in Table Designer or Database Diagrams.

This update does not support the following features for SQL Server 2008:

Data binding features in Client and Web Projects are enabled.

T-SQL and SQL CLR debugging are now enabled for SQL Server 2008.SQL CLR projects that target SQL Server 2008 can be created and deployed to the server.Service Pack Express was released on December 2006. Note that table schemas cannot be viewed or edited in this release. Visual Studio 2005 Express, the first version of Visual Studio Express, was released on October 2005, with support until 2015. Why do I get a permission error when connecting to SQL Server from Visual Studio visual-studio-2010 sql-server-2005-express. Visual Studio 2005 Express, the first version of Visual Studio Express, was released on October 2005, with support until 2015. Server Explorer successfully connects to SQL Server 2008, and database objects such as stored procedures and table data can be viewed and edited.This update addresses this issue and enables the following Visual Studio functionality for SQL Server 2008: The fix for this issue was first released in Cumulative Update 1 for SQL Server 2005 Service Pack 4. Resolution Cumulative update information SQL Server 2005 Service Pack 4. Only servers up to Microsoft SQL Server 2005 are supported.” Note LOB pages are allocated in system transactions because of a design change in SQL Server 2005 SP3, SQL Server 2005 SP4 and in SQL Server 2008 SP1. This update resolves the following error that when you try to use Microsoft Visual Studio 2005 Service Pack 1 design tools to open a database connection to Microsoft SQL Server 2008 :

Visual studio 2005 sp4