Windows Workflow Foundation is one part of the .NET 3.0 framework. To run Windows Workflow, you'll need to download and install the .NET 3.0 redistributable (see the links below):.NET 3.0 (x86):http://go.microsoft.com/fwlink/?LinkID=70848.NET 3.0 (x64):http://go.microsoft.com/fwlink/?LinkID=70849Visual Studio 2005 extensions for .NET Framework 3.0 (Windows Workflow Foundation):http://www.microsoft.com/downloads/details.aspx?FamilyId= 5D61409E-1FA3-48CF-8023-E8F38E709BA6&displaylang=enThe .NET 3.0 runtime requires Windows Server 2003 SP1, Windows XP SP2, or Windows Vista. To develop Windows