C# 字符串计算MD5

	public static string ComputeMD5 (string text)  // 计算字符串的 MD5
	{
		System.Security.Cryptography.MD5CryptoServiceProvider md = new System.Security.Cryptography.MD5CryptoServiceProvider();
		string hc = BitConverter.ToString(md.ComputeHash(Encoding.Default.GetBytes(text)));
		md.Dispose();
		return (hc);
	}