Below is error for your reference . 

Infragistics.Collections.SparseArray+CreateItemEnumerator, InfragisticsWPF4.v15.2, Version=15.2.20152.1000, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb

at Infragistics.Collections.SparseArray.CreateItemEnumerator.EnsureNotExhausted()
at Infragistics.Collections.SparseArray.CreateItemEnumerator.System.Collections.IEnumerator.MoveNext()
at Infragistics.Windows.DataPresenter.RecordCollectionBase.RecordEnumeratorBase.MoveNext()
at Infragistics.Windows.DataPresenter.AutoSizeFieldLayoutInfo.OutOfViewRecordEnumerable.Enumerator.MoveNext()
at Infragistics.Windows.DataPresenter.AutoSizeFieldHelper.RecordEnumeratorBase.MoveNext()
at Infragistics.Windows.DataPresenter.AutoSizeFieldHelper.Calculate(RecordEnumeratorBase outOfViewRecords, AutoSizeCalculationFlags flags, RecordFieldList& recordFieldList, Boolean trackRecords, RecordsInViewHelper recordsInViewHelper)
at Infragistics.Windows.DataPresenter.AutoSizeFieldHelper.Calculate(IEnumerable`1 outOfViewRecords, Boolean recursive, Int32 recordManagerDepth, AutoSizeCalculationFlags flags)
at Infragistics.Windows.DataPresenter.AutoSizeFieldLayoutInfo.PerformAutoSize(Boolean isHorz, IEnumerable`1 autoFields, RecordCollectionBase records, Int32 recordManagerDepth, HashSet recordsSubset, Boolean increaseOnly, OperationType operationType, FieldAutoSizeOptions allowedOptions, RecordsInViewHelper recordsInViewHelper)
at Infragistics.Windows.DataPresenter.AutoSizeFieldLayoutInfo.ProcessPendingOperationsImpl(RecordsInViewHelper recordsInViewHelper)
at Infragistics.Windows.DataPresenter.AutoSizeFieldLayoutInfo.ProcessPendingOperations(List`1 pendingAutoSize, RecordsInViewHelper recordsInViewHelper)
at Infragistics.Windows.DataPresenter.DataPresenterBase.ProcessPendingAutoSizeOperations()
at Infragistics.Windows.DataPresenter.DataPresenterBase.OnPerformFieldAutoSize(Object parameter)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
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 MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
 

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I'm Wokring in corporate . So it's not possible to upload code online .It's come under policy violation 

But i'll try .

Hello,

If will be useful if you can provide some more information about your scenario.

Do you use sorting in your grid? If you do, you can try calling RefreshSort() method of the Records collection:
xamDataGrid1.Records.RefreshSort();

Or you can use the RecordUpdated event:

private void xamDataGrid1_RecordUpdated(object sender, Infragistics.Windows.DataPresenter.Events.RecordUpdatedEventArgs e)
        {
            e.Record.RefreshSortPosition();
        }

Additionally if it is possible, send code you use to remove and add fields.

Yes .

Below are steps I'm doing 

1. On Search  button click i bind data 6 rows to xam data grid .
2. Then remove some column from xam datagrid 
3. again hit Search button It again take 6 rows from database and try to bind xam datagrid 
4. If i repeat above three steps 2-3 times then I'm getting error Enumerator is exhausted and not handled in infragstic and My application dircetly crashed . Even i write properly try catch finally block It doesn't goes in catch & finally block . 

 Worst thing is Application is crashed directly . End user facing lot of problem .

I tried xamDataGrid1.Records.RefreshSort() and  RefreshSortPosition() It's doesn't achieve anything .I'm getting the SAME ERROR

Hello,

Thank you for the details you have provided.

The functionality you are trying to achieve is strongly dependent on the implementation of the respective application and the best way for us to assist you will be if you provide a small isolated sample that we can run and use for debugging locally.  If you are unable able to provide an isolated sample I may be able to give suggestions if you provide the code for your search button, records removing and the table and connections you are using.

If you are unable to share code or isolated sample application on the public forum, please let us know and we will open a private case for you.

Let me know if you require any further assistance on this matter.

Sincerely,
Zhivko
Associate Software Developer