Entity Framework uses Table-per-Hierarchy (TPH) inheritance by default for mapping inheritance hierarchies. This means that all types in the inheritance hierarchy are mapped to a single table in the database, with a discriminator column used to differentiate between the types. While this approach simplifies the database schema, it may lead to null values and can be less performant when dealing with complex inheritance hierarchies.

In the Code-First approach, Entity Framework handles inheritance by defaulting to Table-Per-Hierarchy (TPH) strategy, where all classes in the inheritance hierarchy are mapped to a single table. To implement Table-Per-Concrete Class (TPC) inheritance, explicit configurations are required, specifying separate tables for each class in the hierarchy, resulting in a challenge due to maintaining relationships and ensuring data integrity across multiple tables.

In advanced scenarios, you can customize the mapping of inheritance hierarchies beyond the default strategies provided by Entity Framework using the fluent API. This allows for fine-grained control over entity mappings, including specifying table names, column names, and relationships. Modifying the EDMX file directly is not recommended as it can be complex and error-prone. Customizing SQL queries or extending the base DbContext class may not provide the same level of flexibility as using the fluent API.

When choosing between TPH, TPT, and TPC inheritance strategies in Entity Framework, there are several performance considerations to keep in mind. TPH can result in wide tables with many nullable columns, which can impact storage and query performance, especially when dealing with large datasets. TPT requires additional joins for querying, potentially affecting performance, but it can provide better normalization and query performance compared to TPH in certain scenarios. TPC often leads to redundant data in multiple tables, increasing storage requirements and potentially affecting performance negatively. It's essential to analyze the specific requirements and trade-offs of each strategy to determine the most suitable one for a given scenario.

In Table-per-Type (TPT) inheritance, each type in the hierarchy is mapped to a different database table. This means that each concrete type in the inheritance hierarchy gets its own table in the database, which can lead to a normalized database schema.

To implement a Table-Per-Concrete (TPC) inheritance strategy in Entity Framework, you need to override the OnModelCreating method in your DbContext class and configure the mappings for each concrete type separately.

In Entity Framework Core, the Map method is used in advanced inheritance scenarios to configure specific mappings between an entity and a database table.

In Entity Framework, Table-Per-Concrete (TPC) can be used to resolve ambiguity in the mapping of a complex model with mixed inheritance.

Joined Tables (JT) strategy would be most suitable. In scenarios requiring polymorphic behavior, Joined Tables allow for efficient querying and maintainability. Each class in the hierarchy maps to its own table, with a one-to-one relationship between the base class table and derived class tables. This strategy ensures database normalization while providing flexibility and clarity in the database structure.

The primary use of stored procedures within Entity Framework is to enhance performance and security by reducing the amount of data sent between the database and the application, and by encapsulating business logic on the database server.