I have a custom .NET application which generates SSIS packages. In 2005 and 2008, I reference certain SSIS assemblies (such as Microsoft.SqlServer.ExecPackageTaskWrap.dll) from the GAC. I’ve upgraded to SQL Server 2012, but I don’t see the 11.0.0.0 version in the GAC. Where can I find it?
In SQL Server 2012, the SSIS assemblies were upgraded to .NET 4. As you might already know, .NET 4 has its own GAC, separate from the .NET 2/3.5 GAC. This is located under %WINDIR%\Microsoft.NET\assembly. You can find all of the SSIS assemblies under this path (usually in GAC_MSIL).
Note that as in previous versions, the core SSIS extensibility DLLs (ManagedDTS, DTSRuntimeWrap, DTSPipelineWrap, PipelineHost, and some others) can also be found under <sql install dir>\110\SDK\Assemblies.