Article ID: 2393956 - View products that this article applies to.
Microsoft SharePoint Server 2010 and Microsoft SharePoint Foundation 2010 support a sandboxed development environment for Web Parts and for other solutions. However, the sandboxed environment does not support the export of Web Parts that are developed in that environment. If you try to export a Web Part, the underlying SPUCWebPart class is exported. But the following SPUCWebPart-specific properties are not exported together with the Web Part, and the Web Part will not function as expected:
For more information about how to create solutions in the SharePoint 2010 sandboxed development environment, visit the following MSDN webpages: