Recursive queries in LINQ can cause performance degradation, especially with large datasets, due to the iterative nature of their execution. It's recommended to avoid them for better performance.

DbSet in Entity Framework represents a collection of entities of a specified type in the context. It allows developers to perform CRUD operations (Create, Read, Update, Delete) on entities of that type within the context, providing a high-level abstraction over database tables.

To create a filtered view of data from a DataSet using DataViews, you can use the RowFilter property of the DataView. This property allows you to specify filter criteria based on column values, thereby creating a filtered view of the data according to your requirements.

One of the advantages of data binding is that it helps in keeping the UI and presentation in sync with the underlying data, ensuring consistency between what is displayed and what is stored.

Optimistic concurrency is the preferred model for handling potential conflicts when multiple users can update the same record simultaneously. It assumes that conflicts are rare, allowing multiple users to access and modify the data concurrently. When a user attempts to commit changes, the system checks whether the data has been modified since it was last retrieved. If no modifications are detected, the changes are applied successfully.

The use of stored procedures can help improve performance and security in database applications. By precompiling SQL statements, stored procedures reduce the overhead of repeated compilation, leading to better performance. Furthermore, they enhance security by allowing controlled access to database objects and minimizing the risk of SQL injection attacks.

In DataGrid or DataGridView controls, you can enable data editing by setting the "EditMode" property to allow users to edit the data displayed in the control.

To optimize LINQ queries for performance, you can use the AsQueryable method to reduce the number of database calls. This method converts an IEnumerable collection to an IQueryable collection, allowing the query to be executed on the database server instead of in-memory. This can lead to significant performance improvements, especially when dealing with large datasets or complex queries.

Eager loading retrieves all related data at once, which can enhance performance by reducing the number of database calls. This is done using the LoadWith method of DataLoadOptions.

In an INSERT command in SQL, the VALUES clause is used to specify the values to be inserted into the specified columns of a table. It allows you to define the data that will be added to the table.