Microsoft Dynamics CRM 2013 latest SDK Version SDK Version 6.0.2 is now available on MSDN download center.
The following table lists the significant changes made to this version of the SDK.
| New and updated topics | Description of changes |
| SDK\Bin | Updated the assemblies for Microsoft Dynamics CRM 2013 Update Rollup 2. These assemblies are also compatible with the latest service update for Microsoft Dynamics CRM Online. |
| SDK\Bin\SolutionPackager.exe | Fixed the issue where Solution Packager failed to repack solutions that contain entity level business rules. |
| Authenticate the user with the web services Walkthrough: Register a CRM app with Active Directory Sample: Windows 8 desktop modern SOAP app Sample: Windows 8 desktop modern OData app |
Updated the documentation to include use of Active Directory Federation Services (AD FS) 3.0. |
| Configure email for incoming messages SampleCode\CS\BusinessDataModel\ BusinessManagement\ConfigureQueueEmail.cs SampleCode\VB\BusinessDataModel\ BusinessManagement\ConfigureQueueEmail.vb |
Documented deprecated and read-only attribute changes for the email user name and password attributes in the Queue and UserSettings entities.
Changed the sample code, removing the lines of code that set the attributes. |
| Create a custom workflow activity | Removed support for Microsoft .NET Framework 4.5. Added the requirement to digitally sign the assembly. |
| Install or uninstall the Developer Toolkit | Added a statement that the Developer Toolkit can’t be installed into the Express edition of Microsoft Visual Studio. |
| Xrm.Page.ui (client-side reference) | The Xrm.Page.ui.getCurrentControl method is deprecated in Microsoft Dynamics CRM 2013 Update Rollup 2. |
Microsoft Dynamics CRM Blog 
Removed support for Microsoft .NET Framework 4.5 ???
I don’t think so.