Generate Md5 and SHA hashes in C#.NET.

C#-hash-generator.cs

public static class CryptographyExtensions
{
  /// <summary>
  ///   Calculates the MD5 hash for the given string.
  /// </summary>
  /// <returns>A 32 char long MD5 hash.</returns>
  public static string GetHashMd5(this string input)
  {
    return ComputeHash(input, new MD5CryptoServiceProvider());
  }

  /// <summary>
  ///   Calculates the SHA-1 hash for the given string.
  /// </summary>
  /// <returns>A 40 char long SHA-1 hash.</returns>
  public static string GetHashSha1(this string input)
  {
    return ComputeHash(input, new SHA1Managed());
  }

  /// <summary>
  ///   Calculates the SHA-256 hash for the given string.
  /// </summary>
  /// <returns>A 64 char long SHA-256 hash.</returns>
  public static string GetHashSha256(this string input)
  {
    return ComputeHash(input, new SHA256Managed());
  }

  /// <summary>
  ///   Calculates the SHA-384 hash for the given string.
  /// </summary>
  /// <returns>A 96 char long SHA-384 hash.</returns>
  public static string GetHashSha384(this string input)
  {
    return ComputeHash(input, new SHA384Managed());
  }

  /// <summary>
  ///   Calculates the SHA-512 hash for the given string.
  /// </summary>
  /// <returns>A 128 char long SHA-512 hash.</returns>
  public static string GetHashSha512(this string input)
  {
    return ComputeHash(input, new SHA512Managed());
  }

  public static string ComputeHash(string input, HashAlgorithm hashProvider)
  {
    if (input == null)
    {
      throw new ArgumentNullException("input");
    }

    if (hashProvider == null)
    {
      throw new ArgumentNullException("hashProvider");
    }

    var inputBytes = Encoding.UTF8.GetBytes(input);
    var hashBytes = hashProvider.ComputeHash(inputBytes);
    var hash = BitConverter.ToString(hashBytes).Replace("-", string.Empty);

    return hash;
  }
}