System.data.entity.modelconfiguration.modelvalidationexception: one or more validation errors were detected during model generation

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C#4.0

ASP.NET4

entity-framework

When I try to insert a record using Entity frame work to SQL Database i got below error


System.Data.Entity.ModelConfiguration.ModelValidationException: One or more validation errors were detected during model generation:

DAL.EntityFramework.DataTable: : EntityType 'DataTable' has no key defined. Define the key for this EntityType.
DAL.EntityFramework.CultureInfo: : EntityType 'CultureInfo' has no key defined. Define the key for this EntityType.
DAL.EntityFramework.DateTimeFormatInfo: : EntityType 'DateTimeFormatInfo' has no key defined. Define the key for this EntityType.
DataTables: EntityType: EntitySet 'DataTables' is based on type 'DataTable' that has no keys defined.
CultureInfoes: EntityType: EntitySet 'CultureInfoes' is based on type 'CultureInfo' that has no keys defined.
DateTimeFormatInfoes: EntityType: EntitySet 'DateTimeFormatInfoes' is based on type 'DateTimeFormatInfo' that has no keys defined.

What I have tried:

[Table("InventoryE")]
   public class InventoryE
   {

       [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
       [Key]
       public int ID { get; set; }
       public string ITEM_SID { get; set; }
       public int SBS_NO { get; set; }
       public string ALU { get; set; }
       public string STYLE_SID { get; set; }

   }