How can I use async methods in C# with SQL?

How can I use async methods in C# with SQL?

You can use async methods in C# with SQL by utilizing the async and await keywords along with ADO.NET or Entity Framework.

Can you show me a code example?

Sure! Here's a simple example using ADO.NET:

public async Task<List<User>> GetUsersAsync()
{
    using (var connection = new SqlConnection(connectionString))
    {
        await connection.OpenAsync();
        var command = new SqlCommand("SELECT * FROM Users", connection);
        var reader = await command.ExecuteReaderAsync();
        var users = new List<User>();
        while (await reader.ReadAsync())
        {
            users.Add(new User { Id = reader.GetInt32(0), Name = reader.GetString(1) });
        }
        return users;
    }
}

What about using Entity Framework?

With Entity Framework, you can use the ToListAsync() method. Here's an example:

public async Task<List<User>> GetUsersAsync()
{
    using (var context = new MyDbContext())
    {
        return await context.Users.ToListAsync();
    }
}

Are there any performance considerations?

Yes, using async methods can improve performance by freeing up threads while waiting for I/O operations, but be cautious of context switching overhead.