Random Password

Write a simple C# console application that generates random passwords.

Solution

PasswordGenerator.cs

namespace RandomPassword
{
    internal class PasswordGenerator
    {
        private const string Letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
        private const string Digits = "0123456789";
        private const string Symbols = "!@#$%^&*()_+-=[]{}|;:,.<>?";
        private readonly Random random = new();

        /// <summary>
        /// Generates a random password of the specified length, optionally including digits and symbols
        /// </summary>
        /// <param name="length">The number of characters in the generated string</param>
        /// <param name="includeDigits">Specifies whether digits are included in the generated string</param>
        /// <param name="includeSymbols">Specifies whether symbols are included in the generated string</param>
        public string GetPassword(int length, bool includeDigits = true, bool includeSymbols = true)
        {
            if (length <= 0)
                throw new ArgumentException("Password length must be positive.");

            string chars = Letters;
            if (includeDigits) chars += Digits;
            if (includeSymbols) chars += Symbols;

            return new string(Enumerable.Range(0, length)
                .Select(_ => chars[random.Next(chars.Length)])
                .ToArray());
        }
    }
}

Program.cs

namespace RandomPassword
{
    internal class Program
    {
        static void Main(string[] args)
        {
            var generator = new PasswordGenerator();
            Console.WriteLine("Generated passwords:");

            // Generate a password with default settings (includes digits and symbols)
            var password = generator.GetPassword(12);
            Console.WriteLine($"{password}");

            // Generate a password without symbols
            password = generator.GetPassword(12, true, false);
            Console.WriteLine($"{password}");

            // Generate a password with only letters
            password = generator.GetPassword(12, false, false);
            Console.WriteLine($"{password}");
        }
    }
}

Features

• Choose password length
• Optionally include digits and symbols
• Clean, object-oriented structure
• Easy to extend or integrate

Building and Running

Using Visual Studio

1. Open the project in Visual Studio
2. Press F5 or click "Start" to build and run

Using .NET CLI

dotnet run

Output

Generated passwords:
bZ2mRZJC5u6h
bV7tvdiqZj8s
DMoXUBnNvMfZ

Source Code

Please refer to the GitHub repository.