EF DBContext 处置不关闭连接

csharp
public class MyDbContext : DbContext
{
    public MyDbContext() : base("name=MyConnectionString")
    {
        this.Configuration.AutoCloseConnection = false;
    }
    // DbSet and other properties
    protected override void Dispose(bool disposing)
    {
        if (disposing && this.Database.Connection.State != ConnectionState.Closed)
        {
            this.Database.Connection.Close();
        }
        base.Dispose(disposing);
    }
}