Csharp 如何将字节数组转换为字符串并返回

我正在将byte[]转换为字符串并返回. 转换回的字节[]与原始字节不相同.

How do I convert bytes to string and back correctly?

一个控制台应用程序来说明这一点: Program.cs

_ = new TestByteConversion();

TestByteConversion.cs

internal class TestByteConversion
{
    public TestByteConversion()
    {
        var aes = Aes.Create();
        aes.GenerateKey();
        var keyAsString = GetKeyAsString(aes.Key);

        // I save it in a key value pair as string.
        // I get the value as string from dictionary.
        var keyAsyBytes = GetKeyFromString(keyAsString);

        // USE NuGet ConsoleTables !
        var table = new ConsoleTable("ID", "origin", "char", "new value");

        for (var i = 0; i < keyAsString.Length; i++)
        {
            table.AddRow(i, aes.Key[i], keyAsString[i], keyAsyBytes[i]);
        }

        table.Write();
    }

    public static byte[] GetKeyFromString(string keyAsString)
    {
        return Encoding.ASCII.GetBytes(keyAsString);
    }

    public static string GetKeyAsString(byte[] byteArray)
    {
        return Encoding.ASCII.GetString(byteArray);
    }
}