How do I set a field to DBNull in Entity Framework -


How do you set DBNull to field in the unit framework? The fields are strongly typed so you can not set it equal to DBNull.Value and I did not find any way to set the field for debubulle. It seems that there is an essential thing to do, but after a lot more Google research I did not find anything about it

I am trying to set a datetime field in the unit framework using vb.net. It is necessary to write to me 

  myEntity.mydate = nothing

this field is not set to blank but instead it is set to be the default date value Sets in SQL Server does not have a valid date value.

If a column is taped in the database then the result class will be

for example If any order is a null qualified date time column created date in the table, then something like that appears as order class Will give: 

  public partial order order: EntityObject {... personal date time? _ Date of reference; ...}

If there is no value of the created date when you call ObjectContext.SaveChanges () a System


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