C#

_hubProxy.Invoke("SomeMethodName", model).ContinueWith((t) =>
{
    if (t.Exception != null && t.Exception.InnerException != null)
    {
        //Log the current exception
        throw t.Exception.Flatten();
    }
});

_hubProxy.Invoke("SomeMethodName", model).ContinueWith((t) =>
{   
    if (t.Exception != null && t.Exception.InnerException != null)
    {
        AggregateException ae = t.Exception.Flatten();
        ae.Handle(x =>
        {
              if (x is IndexOutOfRangeException)
              {
                //Do stuff
                return true;
              }
              return false;
        });
    }
});

if (t.Exception?.InnerException != null)

hassaan mustafa wrote:

I am trying to keep thread/process active, when application is minimized to tray

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

var Customers = NAVCient.Customer_Card;
... = Customers.ToList();
etc.

List<NAVEntities.Customer_Card> Customers = NAVCient.Customer_Card.ToList;

Microsoft.OData.Client.DataServiceQuery(Of Customer_Card) 

Microsoft.OData.Client.QueryOperationResponse(Of Customer_Card)

Global.Microsoft.OData.Client.DataServiceQuery(Of Customer_Card)

System.Collections.Generic.List(Of NAVEntities.Customer_Card) 

Microsoft.OData.Core.ODataException was unhandled
  HResult=-2146233079
  Message=When writing a JSON response, a user model must be specified and the entity set and entity type must be passed to the ODataMessageWriter.CreateODataEntryWriter method or the 
  ODataFeedAndEntrySerializationInfo must be set on the ODataEntry or ODataFeed that is being written.
  Source=Microsoft.OData.Core
  StackTrace:
       at Microsoft.OData.Core.ODataFeedAndEntryTypeContext.ValidateAndReturn[T](T value)
       at Microsoft.OData.Core.ODataFeedAndEntryTypeContext.get_NavigationSourceName()
       at Microsoft.OData.Core.Evaluation.ODataConventionalEntityMetadataBuilder.ComputeId()
       at Microsoft.OData.Core.Evaluation.ODataConventionalEntityMetadataBuilder.ComputeAndCacheId()
       at Microsoft.OData.Core.Evaluation.ODataConventionalEntityMetadataBuilder.GetId()
       at Microsoft.OData.Client.Materialization.MaterializerEntry.UpdateEntityDescriptor()
       at Microsoft.OData.Client.Materialization.FeedAndEntryMaterializerAdapter.ReadEntryCore()
       at Microsoft.OData.Client.Materialization.FeedAndEntryMaterializerAdapter.TryReadEntry(MaterializerEntry& entry)
       at Microsoft.OData.Client.Materialization.FeedAndEntryMaterializerAdapter.<LazyReadEntries>d__0.MoveNext()
       at Microsoft.OData.Client.Materialization.FeedAndEntryMaterializerAdapter.Read()
       at Microsoft.OData.Client.Materialization.ODataReaderEntityMaterializer.ReadNextFeedOrEntry()
       at Microsoft.OData.Client.Materialization.ODataEntityMaterializer.ReadImplementation()
       at Microsoft.OData.Client.MaterializeAtom.MoveNextInternal()
       at Microsoft.OData.Client.MaterializeAtom.MoveNext()
       at System.Linq.Enumerable.<CastIterator>d__94`1.MoveNext()
       at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
       at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
       at Data.WebServices.ODataTestApp.MainModule.Main() in Data.WebServices.OData.TestApp\MainModule.cs:line 19
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

Quote:

The document at the url file:///e:/client.xml was not recognized as a known document type.
The error message from each known type may help you fix the problem:
- Report from 'XML Schema' is 'The root element of a W3C XML Schema should be <schema> and its namespace should be 'http://www.w3.org/2001/XMLSchema'.'.
- Report from 'DISCO Document' is 'Discovery document at the URL file:///e:/client.xml could not be found.'.
- The document format is not recognized.
- Report from 'WSDL Document' is 'There is an error in XML document (2, 2).'.
- <edmx xmlns="http://docs.oasis-open.org/odata/ns/edmx"> was not expected.
If the service is defined in the current solution, try building the solution and adding the service reference again.

<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="4.0" xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
  <edmx:DataServices>
    <Schema Namespace="NAV" xmlns="http://docs.oasis-open.org/odata/ns/edm">