1. In Visual Studio, include your SharePoint 2010 source project in the SharePoint 2013 solution. 2. In the code source files for user controls, change the SharePoint version from 14 to 15. 3. You can either use the new feature that is generated or bring the project items into an existing feature. 4. To bring […]

If you get the following error in a sandboxed Web Part: “The name initializecontrol() does not exist in the current context” Use <sharepoint:scriptlink > for .css and .js.

Feature upgrades for farm-based solutions need to follow a lifecycle: https://msdn.microsoft.com/en-us/library/office/aa543659(v=office.14).aspx