This is my code:
return Newsletterctx.Subscribers.Count(o =>
o.Validated == false &&
o.ValidationEmailSent == true &&
o.Su
Now, EntityFramework, Version=6 above, you can jus use System.Data.Entity.DbFunctions
return Newsletterctx.Subscribers.Count(o =>
o.Validated == false &&
o.ValidationEmailSent == true &&
DbFunctions.AddMonths(o.SubscriptionDateTime,1) < DateTime.Now);
However, in this case, use the temp variable testDate that answered by Fredrik Mörk uses less resources.