Entity Framework: Code First

targets a database that doesn’t exist and Code First will create it

Annotations

System.ComponentModel.DataAnnotations

• Key
  • Composite keys: Add Column Annotation [Key, Column(Order = 1)]
• Timestamp: Only 1 allowed per Entity, and has to be a byte[]
• ConcurrencyCheck
  • A way to add Optimistic Concurrency
  • can be applied to multiple properties
  • Will include the property in update command to check for optimistic concurrency
• Required: NotNull
• MinLength
• MaxLength
• StringLength

System.ComponentModel.DataAnnotations.Schema

• Table
• Column
• Index
• ForeignKey
• NotMapped
• InverseProperty