diff --git a/src/VisualStudio/Core/Def/Implementation/ProjectSystem/VisualStudioWorkspaceImpl.cs b/src/VisualStudio/Core/Def/Implementation/ProjectSystem/VisualStudioWorkspaceImpl.cs
index 0d5a5e42200fbd218d8683ff7520e18630235fef..89966d2044a19621248742f0236ca157032f67a3 100644
--- a/src/VisualStudio/Core/Def/Implementation/ProjectSystem/VisualStudioWorkspaceImpl.cs
+++ b/src/VisualStudio/Core/Def/Implementation/ProjectSystem/VisualStudioWorkspaceImpl.cs
@@ -677,7 +677,7 @@ public void OpenDocumentCore(DocumentId documentId, bool activate = true)
 
             if (!foregroundObject.IsForeground())
             {
-                throw new NotSupportedException(ServicesVSResources.ThisWorkspaceOnlySupportsOpeningDocumentsOnTheUIThread);
+                throw new InvalidOperationException(ServicesVSResources.ThisWorkspaceOnlySupportsOpeningDocumentsOnTheUIThread);
             }
 
             var document = this.GetHostDocument(documentId);