Microsoft.VisualStudio.VIL.DebuggerHost.BinaryResolutionFailureException during expression evaluation

The following error stack is the 2nd most non fatal error we are encountering in the debugger. While we know there are cases where we won't be able to resolve the assembly, we didn't think those would be hit frequently:

at Microsoft.VisualStudio.VIL.DebuggerHost.FusionHelper.LoadAssemblyByName(AssemblyResolver resolver, AssemblyName assemblyName, Boolean fThrowOnError, IList`1 specialCasedAssemblies)#N# at Microsoft.VisualStudio.VIL.DebuggerHost.AssemblyResolver.ResolveAssembly(AssemblyName name, Boolean fThrowOnError)#N# at Ilrun.CachedTypeUniverse.AssemblyResolutionCache.LookupAndAddCachedResolution(String typeName)#N# at Ilrun.CachedTypeUniverse.ResolveAssembly(Module scope, Token tokenAssemblyRef, String typeName)#N# at Microsoft.MetadataReader.MetadataOnlyModule.ResolveTypeRef(ITypeReference typeReference)#N# at Ilrun.ModuleEntry.ResolveTypeRef(CachedTypeRef typeRef)#N# at Microsoft.MetadataReader.TypeProxy.Equals(Type t)#N# at Microsoft.VisualStudio.VIL.VisualStudioHost.VilEvaluationServices.Find_ToStringMethod(Type type, ITypeUniverse universe)#N# at Microsoft.VisualStudio.VIL.VisualStudioHost.VilEvaluationServices.EvaluateToString(DkmInspectionContext inspectionContext, VilEvaluationResult evalResult)#N# at VSDeb