Storing user data in a database

{

{

}

}

{

}

And this code to read the data:

private void button1_Click(object sender, EventArgs e)

using (StreamReader reader = new StreamReader("C:\\pass.txt"))

string[] allLines = File.ReadAllLines(@"C:\pass.txt");

string[] usernames = new string[allLines.Length];

string[] passwords = new string[allLines.Length];

for (int i = 0; i < allLines.Length; i++)

string[] lineSplit = allLines[i].Split(',');

string username = textBox1.Text;

string password = hashed_password(textBox2.Text);

for (int i = 0; i < usernames.Length; i++)

if (usernames[i] == username)

if (passwords[i] == password)

this.Hide();

Form3 frm = new Form3();

return;

else

MessageBox.Show("Incorrect username/password.");

return;

MessageBox.Show("Incorrect username/password.");

static string hashed_password(string to_be_hashed)

byte[] arrbyte = new byte[to_be_hashed.Length];

SHA1 hash = new SHA1CryptoServiceProvider();

arrbyte = hash.ComputeHash(System.Text.Encoding.UTF8.GetBytes(to_be_hashed));

return Convert.ToBase64String(arrbyte);

private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

Form2 frm = new Form2();