WordPress C# User Login

I have a very basic C# login system first i’ve work with localhost and basic databasebase username-password but now i want to connect my project to my website which is wordpress then i realize wordpress database is not at all basic they encrypt user passwords.

This is the code of my login system

MySqlCommand cmd =
                    new MySqlCommand("SELECT * FROM member.member WHERE username=@username AND password=@password ;",
                        connection);
                cmd.Parameters.AddWithValue("@username", this.metroTextBox1.Text);
                cmd.Parameters.AddWithValue("@password", this.metroTextBox2.Text);

and this is a example password which is 123456

$P$B84VsdpgngrtX/Aep0VNW3X1mz8mzJ.

But this is 123456 too

$P$B9sKzYbWqf.BTewOR7G.4j2.1.7S87/

and this

$P$BCkM0oYKnu2/M1Xz5BtDBjnLqKOn.4.

how can i recode my program and check password true or false.