Here is an example how to make a composite primary key in EF Code First
public class Something
[Key, Column(Order = 0)]
public int Key1Name { get; set; }
[Key, Column(Order = 1)]
public int Key2Name { get; set; }
}
[Key, Column(Order = 0)]
public int Key1Name { get; set; }
[Key, Column(Order = 1)]
public int Key2Name { get; set; }
}
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