ArgumentNullException in CreateFaceBookContactFromShellContact()

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What steps will reproduce the problem?
1.Cannot reliably reproduce.
2.
3.

What is the expected output? What do you see instead?

What version of the product are you using? (MSNPSharp, OS, Mono etc.)

msnp-sharp-5.0.0.2717

DotNET = 4.0.30319.488
User = NT AUTHORITY\LOCAL SERVICE
ProcessorCount = 4
OperatingSystem = Microsoft Windows NT 6.1.7601 Service Pack 1 (64-bit)
Is64BitProcess = True
CurrentDirectory = C:\Windows\system32

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Please provide any additional information below:
I get the following uncaught exception :

Exception         = System.ArgumentNullException: Value cannot be null.
Parameter name: uriString
   at System.Uri..ctor(String uriString)
   at MSNPSharp.IO.XMLContactList.CreateFaceBookContactFromShellContact(Contact coreContact, ContactType shellContact, Boolean isIndividualShellContact)
   at MSNPSharp.IO.XMLContactList.CreateContactFromLinkedShellContact(Guid personID, String sourceID)
   at MSNPSharp.IO.XMLContactList.CreateContactsFromShellContact()
   at MSNPSharp.IO.XMLContactList.MergeIndividualAddressBook(ABFindContactsPagedResultType forwardList)
   at MSNPSharp.IO.XMLContactList.Merge(ABFindContactsPagedResultType forwardList)
   at MSNPSharp.ContactService.<>c__DisplayClassa.<abRequest>b__9(Object sender, ABFindContactsPagedCompletedEventArgs abfcpcea)
   at MSNPSharp.ContactService.<>c__DisplayClass5f.<ABFindContactsPagedAsync>b__5e(Object sender, ABFindContactsPagedCompletedEventArgs e)
   at MSNPSharp.MSNWS.MSNABSharingService.ABServiceBinding.OnABFindContactsPagedOperationCompleted(Object arg)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

Original issue reported on code.google.com by dutoit...@gmail.com on 24 Feb 2012 at 8:59

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This issue was closed by revision 7c818726d5e2.

Original comment by hepha...@gmail.com on 24 Feb 2012 at 10:10

• Changed state: Fixed

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This issue was updated by revision 7c818726d5e2.

Original comment by hepha...@gmail.com on 24 Feb 2012 at 10:10

• Added labels: Milestone-Release5.0.2

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This issue was closed by revision c7590c35d832.

Original comment by hepha...@gmail.com on 24 Feb 2012 at 10:13

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This issue was updated by revision c7590c35d832.

Original comment by hepha...@gmail.com on 24 Feb 2012 at 10:13

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ShouldBeFixed=Issue has been fixed in code but not released yet

Original comment by hepha...@gmail.com on 27 Feb 2012 at 3:56

• Changed state: ShouldBeFixed

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Original comment by hepha...@gmail.com on 27 Feb 2012 at 3:59

• Changed title: ArgumentNullException in CreateFaceBookContactFromShellContact()

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Original comment by freezing...@gmail.com on 1 Mar 2012 at 2:38

• Changed state: Fixed