Error Accessing SharePoint 2010 ListData.svc 'System.Data.Services.Providers.IDataServiceUpdateProvider' from assembly 'System.Data.Services, Version=3.5.0.0

If you receive this error

when attempting towork with SharePoint 2010 WCF Services you need to install one of the following hotfixes:

ADO.NET Data Services Update for .NET Framework 3.5 SP1 for Windows 7 and Windows Server 2008 R2

ADO.NET Data Services Update for .NET Framework 3.5 SP1 for Windows 2000, Windows Server 2003, Windows XP, Windows Vista and Windows Server 2008

Don't forget to download the x64 executable! And on a side note, I did have to restart my development system. Just a reset of IIS was not enough.

Creating a Drag-and-Drop Upload Web Part for SharePoint Foundation 2010

Today I was working on a web part for SharePoint that would allow the user to either select files using an OpenFileDialog or via Silverlight 4’s drag-and-drop support. I came across a pretty serious issue once I completed my XAP file and uploaded it to my library. Drag-and-drop support was not available in SharePoint! When I would drag a file to the surface of the Silverlight web part and drop it, the browser would try to open the file. There is a pretty easy fix for this but I had to search all over the Interwebs to find the complete solution. Here is what you can do as well as an example of the code.