SHA256Managed/SHA512Managed已过时:Derived cryptographic types are obsolete. Use the Create method on the base type instead

/// <summary>
/// 散列算法加密SHA256位Hash，不可逆
/// </summary>
/// <param name="clearText">明文字符串</param>
/// <returns></returns>
public static string ToSHA256Hash(string clearText)
{
    SHA256 sha256 = SHA256.Create();
    byte[] encryptedBytes = sha256.ComputeHash(UTF8Encoding.UTF8.GetBytes(clearText));
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < encryptedBytes.Length; i++)
    {
        sb.AppendFormat("{0:x2}", encryptedBytes[i]);
    }
    return sb.ToString();
}

/// <summary>
/// 散列算法加密SHA512位Hash，不可逆
/// </summary>
/// <param name="clearText">明文字符串</param>
/// <returns></returns>
public static string ToSHA512Hash(string clearText)
{
    SHA512 shaM = SHA512.Create();

    byte[] encryptedBytes = shaM.ComputeHash(UTF8Encoding.UTF8.GetBytes(clearText));
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < encryptedBytes.Length; i++)
    {
        sb.AppendFormat("{0:x2}", encryptedBytes[i]);
    }

    return sb.ToString();
}