Please restore the packages if you are using this version. The " Download source (Packages Excluded)" zipped file contains the light version of the demo where the packages are excluded. Before running the application, please change the connection string according to your system or server. However, there are commented codes which can be used to test the Code First convention and configuration for creating primary key. The attached source code contains the final version of the walk-through. The order of priorities for creating primary key using Entity Framework Code First is:Ĭonvention -> Data Annotation -> Fluent API (Highest Priority) Notes to Use the Attached Source Code Before creating the model, Code First takes convention into consideration first, then reads the data annotation attributes and finally reads the mappings specified by Fluent API. Fluent API has the highest priority among the three for creating the tables and columns. ![]() There are certain mappings which cannot be done using data annotation attribute but can be done by using Fluent API. The data annotation attributes are limited. ![]() But Fluent API method is preferable as it separates the mapping logic from the domain classes. There are three different ways to create primary key using Code First. (DatabaseGeneratedOption.None) Conclusion ModelBuilder.Entity().Property(s => s.Id).HasDatabaseGeneratedOption
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