Password Code in C#

Example : How to set the Password Character in the Password box in C#?

 private void Form1_Load(object sender, EventArgs e)
        {
  
            TxtPass.PasswordChar = '*';
            TxtCPass.PasswordChar = '*';

            //TxtPass.UseSystemPasswordChar = true;
            //TxtCPass.UseSystemPasswordChar = true;
        }

Example: How to set up different types of Password Validation in the Password box in C#?

using System;
using System.Linq;
using System.Windows.Forms;

private bool ValidatePassword()   //Function Creation
{
    string password = TxtPass.Text;

    // Password cannot be empty/blank
    if (string.IsNullOrWhiteSpace(password))
    {
        MessageBox.Show("Please must enter Password.");
        TxtPass.Focus();
        return false;
    }


    // Length validation 8-20
    if (password.Length < 8 || password.Length > 20)
    {
        MessageBox.Show("Password must be between 8 and 20 characters.");
        TxtPass.Focus();
        return false;
    }


    // Uppercase letter validation
    if (!password.Any(char.IsUpper))
    {
        MessageBox.Show("Password must contain at least one uppercase letter.");
        TxtPass.Focus();
        return false;
    }


    // Lowercase letter validation
    if (!password.Any(char.IsLower))
    {
        MessageBox.Show("Password must contain at least one lowercase letter.");
        TxtPass.Focus();
        return false;
    }


    // Number validation
    if (!password.Any(char.IsDigit))
    {
        MessageBox.Show("Password must contain at least one number.");

        TxtPassword.Focus();
        return false;
    }


    // Special character validation
    if (!password.Any(ch => !char.IsLetterOrDigit(ch)))
    {
        MessageBox.Show("Password must contain at least one special character.");
        TxtPass.Focus();
        return false;
    }


    // Space validation
    if (password.Contains(" "))
    {
        MessageBox.Show("Password cannot contain spaces.");
        TxtPass.Focus();
        return false;
    }


    // Confirm Password validation
    if (password != TxtCPass.Text)
    {
        MessageBox.Show("Password and Confirm Password do not match.");
        TxtCPass.Focus();
        return false;
    }


    return true;
}



//Now, call the above function 'ValidatePassword()' on Save Button Click Event as below.

private void BtnSave_Click(object sender, EventArgs e)
{
    // Validate password
    if (!ValidatePassword())
    {
        return;
    }

    // Now continue rest save or database code from here.

}