当你不知道编码时，从字节数组转换到字符串的一般解决方案:

static string BytesToStringConverted(byte[] bytes)
{
    using (var stream = new MemoryStream(bytes))
    {
        using (var streamReader = new StreamReader(stream))
        {
            return streamReader.ReadToEnd();
        }
    }
}

当你不知道编码时，从字节数组转换到字符串的一般解决方案:

static string BytesToStringConverted(byte[] bytes)
{
    using (var stream = new MemoryStream(bytes))
    {
        using (var streamReader = new StreamReader(stream))
        {
            return streamReader.ReadToEnd();
        }
    }
}

还有一个类UnicodeEncoding，使用起来非常简单:

ByteConverter = new UnicodeEncoding();
string stringDataForEncoding = "My Secret Data!";
byte[] dataEncoded = ByteConverter.GetBytes(stringDataForEncoding);

Console.WriteLine("Data after decoding: {0}", ByteConverter.GetString(dataEncoded));

试试这个控制台应用程序:

static void Main(string[] args)
{
    //Encoding _UTF8 = Encoding.UTF8;
    string[] _mainString = { "Hello, World!" };
    Console.WriteLine("Main String: " + _mainString);

    // Convert a string to UTF-8 bytes.
    byte[] _utf8Bytes = Encoding.UTF8.GetBytes(_mainString[0]);

    // Convert UTF-8 bytes to a string.
    string _stringuUnicode = Encoding.UTF8.GetString(_utf8Bytes);
    Console.WriteLine("String Unicode: " + _stringuUnicode);
}

除了选择的答案，如果你使用。net 3.5或。net 3.5 CE，你必须指定解码的第一个字节的索引，以及解码的字节数:

string result = System.Text.Encoding.UTF8.GetString(byteArray, 0, byteArray.Length);

应用(字节)b to弦(“x2”)，Outputs b4b5dfe475e58b67

public static class Ext {

    public static string ToHexString(this byte[] hex)
    {
        if (hex == null) return null;
        if (hex.Length == 0) return string.Empty;

        var s = new StringBuilder();
        foreach (byte b in hex) {
            s.Append(b.ToString("x2"));
        }
        return s.ToString();
    }

    public static byte[] ToHexBytes(this string hex)
    {
        if (hex == null) return null;
        if (hex.Length == 0) return new byte[0];

        int l = hex.Length / 2;
        var b = new byte[l];
        for (int i = 0; i < l; ++i) {
            b[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
        }
        return b;
    }

    public static bool EqualsTo(this byte[] bytes, byte[] bytesToCompare)
    {
        if (bytes == null && bytesToCompare == null) return true; // ?
        if (bytes == null || bytesToCompare == null) return false;
        if (object.ReferenceEquals(bytes, bytesToCompare)) return true;

        if (bytes.Length != bytesToCompare.Length) return false;

        for (int i = 0; i < bytes.Length; ++i) {
            if (bytes[i] != bytesToCompare[i]) return false;
        }
        return true;
    }

}