c# - RIA EntityQuery duplicating rows where one of the values matches -

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In my application I work as an entity, if I use SQL Profiler, it catches the SQL query which Is generated, and runs it manually, this result I expect. For example 

  Val Date 68 2011-05-31 00: 00: 00.000 48 2011-05-30 00: 00: 00.000 92 2011-05-29 00: 00: 00.000 52 2011 - 05-28 00: 00: 00.000 32 2011-05-27 00: 00: 00.000 32 2011-05-26 00: 00: 00.000 52 2011-05-25 00: 00: 00.000 81 2011-05-24 00: 00: 00.000   
 If I touch a breakpoint in my code and see if load operation. Determination, then I know that when the 'Wall' figure for entry already appears (Up to IE 52), then load operation. The data collection uses data from the previous entry (actual value Instead of somewhere with a value of 52). So in the above data, my load operation. Definition (note that the dates are repeated now, it appears because 'wall' has already happened)  
  68 2011-05 -31 00:00: 00.000 48 2011-05-30 00: 00: 00.000 92 2011-05-29 00: 00: 00.000 52 2011-05-28 00: 00: 00.000 32 2011-05-27 00: 00: 00.000 32 2011-05- 27 00: 00: 00.000 52 2011-05-28 00: 00: 00.000 81 2011-05-24 00: 00: 00.000   
 Is there anyone like this Used to be?  
 looks like my entity  
  var appadactu = context. GateWwuccadates () Where (D = & gt; DKPIDAT & lt; = overview & amp; amp; D.GELID == Zeoland & amp; amp; amp; d.clockworkID == ClockWorkID). Orderbidescoding (d = & gt; d. Kpidet);   
 and it generates the correct T-SQL, which returns the correct value when executing it in SQL Query Analyzer.  
 The rest of the code  
 
  Load operation = References. Load & lt; VwKeyData & gt; (Appetector); Lo.Completed + = New Event Handler (Load Operation_Full);   
 EventHandler  
  Public Zero Load Operation_Full (Object Sender, EventEurge E) {Load Operation & lt; VwKeyData & gt; HistResults = Sender as Load Operation & lt; VwKeyData & gt; Int _count = 0; Foreach (vvKeyData v) in Histrists. {.......   
 From this point histResults.Entities are already wrong. Any help would be appreciated as it is some of the charting things that I am working to get screwed up.  
   
 
 
 You have to set the following.  
  context.vwKeyData.MergeOption = MergeOption.OverwriteChanges;   
  Overwrite Change  will ensure that the data is always loading from the data source, it should help us solve our problem.

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