C# Parallel ForEach Unhandled User Code For WorkItem Fields Information Retriving

Question

Currently I am working on a project to get information from the TFS trying to build a custom tool

I have decided to improve the performance of the tool and i got stuck with 1 issue using the Parallel option (.Net 4+)

Remark: I have tried placing safe thread on the queryresults and item it didn't help code samples are at the bottom

I am trying to perform the next code:

    WorkItemCollection queryResults;
//Query run to populate the collection
                    Parallel.ForEach<WorkItem>(queryResults.Cast<WorkItem>(), item => {
                    Console.WriteLine(item.Fields.GetById(AttributeCode.Default.RemainingWork).Value);
        });

Error quote:

An exception of type 'Microsoft.TeamFoundation.TeamFoundationServiceUnavailableException' occurred in Microsoft.TeamFoundation.WorkItemTracking.Proxy.dll but was not handled in user code

Log from Exception Catch:

A first chance exception of type 'System.InvalidOperationException' occurred in mscorlib.dll System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at System.Collections.Generic.Dictionary2.KeyCollection.Enumerator.MoveNext() at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessFields(Int32 row, IEnumerable1 fieldIds, Dictionary2 fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessRevision(Int32 row, Dictionary2 rowMap, Dictionary2 plainFields, Dictionary2 textFields) at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.Read(Int32 row, Int32[] fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItemCollection.QueryFieldValues(Int32 index, Int32[] fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_IsAccessDenied() at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.QueryFieldValue(Int32 field) at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItemFieldData.GetFieldValue(Int32 id, Int32 revision) at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.CheckUpdateCachedData() at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Type() at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Fields()

Block protection on the items not sure if i've done it right:

WorkItemCollection queryResults;
    //Query run to populate the collection
        BlockingCollection<WorkItem> bc = new BlockingCollection<WorkItem>();
        WorkItem temp;
        Parallel.ForEach<WorkItem>(queryResults.Cast<WorkItem>(), item =>
        {
            bc.Add(item);
            if (bc.TryTake(out temp))
                Console.WriteLine(temp.Fields[CoreField.CreatedBy]);
        });

Error:

A first chance exception of type 'System.InvalidOperationException' occurred in mscorlib.dll A first chance exception of type 'System.InvalidOperationException' occurred in mscorlib.dll System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at System.Collections.Generic.Dictionary2.KeyCollection.Enumerator.MoveNext() at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessFields(Int32 row, IEnumerable1 fieldIds, Dictionary2 fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessRevision(Int32 row, Dictionary2 rowMap, Dictionary2 plainFields, Dictionary2 textFields) at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.Read(Int32 row, Int32[] fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItemCollection.QueryFieldValues(Int32 index, Int32[] fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_IsAccessDenied() at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.QueryFieldValue(Int32 field) at Microsoft.TeamFoundation.A first chance exception of type 'System.InvalidOperationException' occurred in SW-QA Tasks.exe WorkItemTracking.Client.WorkItemFieldData.GetFieldValue(Int32 id, Int32 revision) at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.CheckUpdateCachedData() at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Type() at Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Fields() System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at System.Collections.Generic.Dictionary2.KeyCollection.Enumerator.MoveNext() at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessFields(Int32 row, IEnumerable1 fieldIds, Dictionary`2 fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessRevision(Int32 row, D