c# - Canonical Function in Linq to Entities not working -

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This code is trying to run in my code: 

  var rslt = Ent.AppointmentDiaries where (s = & gt; s.DateTimeScheduled & gt; = day & amp; amp; organization function; s.DateTimeScheduled, s.AppointmentLength) & lt; = toDate;

It breaks down with: 

  One type of exception was 'System.NotSupportedException' in EntityFramework.SqlServer.dll but the user code is in additional Information: The method for the LINQ unit 'System.Nullable' 1 [System.DateTime] AddMinutes (System.Nullable`1 [System.DateTime], System.Nullable`1 [System.Int32]) 'does not recognize the method, And this method can not be translated into the store expression. By using EntryPrimework 6.1.0 <...  
 I know about authentic guns, so I expect the entity function. To work with Adidines to question the questions ...  
 Any thoughts that I am doing wrong?  
  
 
 
 In Entity Framework 6 by  EntityFunctions   DbFunctions  Has been replaced. The old class has now been marked as obsolete and will disappear in the future. 
 
 I must admit that when you are Google for release notes, this is not straightforward, though it is a blog in which how this change has been described.

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