Pretzel: The located assembly's manifest definition with name 'openfoundation' does not match the

Question

We have got 5.0.2 Plumtree portal, EDK 5.0.2 and .Net Web Controls 2.1.
I am trying to call:
IPortletContext oPortletContext = PortletContextFactory.CreatePortletContext(System.Web.HttpContext.Current.Request, System.Web.HttpContext.Current.Response);
I have attached the error I am getting. Is this related to Open Foundation version? This is quite urgent because we are in the process of trying to get a demo together for grabbing Activity Rights.
Server Error in '/portlets/DOJ/JNET/pretzel.clients.doj.reentry' Application.
The located assembly's manifest definition with name 'openfoundation' does not match the assembly reference.Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.IO.FileLoadException: The located assembly's manifest definition with name 'openfoundation' does not match the assembly reference.Source Error:An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.Assembly Load Trace:The following information can be helpful to determine why the assembly 'openfoundation' could not be loaded.=== Pre-bind state information ===
LOG: DisplayName = openfoundation, Version=2.0.9.8318, Culture=neutral, PublicKeyToken=d0e882dd51ca12c5
(Fully-specified)
LOG: Appbase = file:///E:/Data/HSTPRDAPP01/Inetpub/plumtree/portlets/DOJ/JNET/pretzel.clients.doj.reentry
LOG: Initial PrivatePath = bin
Calling assembly : dotnetportlet, Version=3.5.0.1, Culture=neutral, PublicKeyToken=null.
===
LOG: Publisher policy file is not found.
LOG: No redirect found in host configuration file (C:\WINNT\Microsoft.NET\Framework\v1.1.4322\aspnet.config).
LOG: Using machine configuration file from C:\WINNT\Microsoft.NET\Framework\v1.1.4322\config\machine.config.
LOG: Post-policy reference: openfoundation, Version=2.0.9.8318, Culture=neutral, PublicKeyToken=d0e882dd51ca12c5
LOG: Attempting download of new URL file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/portlets_doj_jnet_pretzel.clients.doj.reentry/26128f6f/cfc1837a/openfoundation.DLL.
LOG: Attempting download of new URL file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/portlets_doj_jnet_pretzel.clients.doj.reentry/26128f6f/cfc1837a/openfoundation/openfoundation.DLL.
LOG: Attempting download of new URL file:///E:/Data/HSTPRDAPP01/Inetpub/plumtree/portlets/DOJ/JNET/pretzel.clients.doj.reentry/bin/openfoundation.DLL.
WRN: Comparing the assembly name resulted in the mismatch: Minor Version
Stack Trace:[FileLoadException: The located assembly's manifest definition with name 'openfoundation' does not match the assembly reference.]
   Plumtree.Remote.Portlet.PortletContextFactory.CreatePortletContext(HttpRequest req, HttpResponse resp) +0
   pretzel.clients.doj.reentry.navigation.Page_Load(Object sender, EventArgs e) in \\devnet2\inetpub\doj\reentry\development\pretzel.clients.doj.reentry\navigation.aspx.cs:22
   System.Web.UI.Control.OnLoad(EventArgs e) +67
   System.Web.UI.Control.LoadRecursive() +35
   System.Web.UI.Page.ProcessRequestMain() +750
Version Information: Microsoft .NET Framework Version:1.1.4322.1031; ASP.NET Version:1.1.4322.947

Answer 1

I have seen this before after a upgrade of the EDK, found I had to remove the reference in the C# project to the old EDK dll and re add it to the new EDK dll.
Also noticed that you are using the System.Web.HttpContext.Current fully qualified namespace in the CreatePortletContext() call instead of the usual way of PortletContextFactory.CreatePortletContext(Request, Response) this uses the System.Web.HttpRequest.Page namespace by default.