Dynamic content and State attribute

I had a problem with the State attribute. This is the attribute that is saved inside the span [SPAN class=dynamiccontent contentEditable=false style="....." disabled hash="oqAE..zt1Y=" state="xxx"][/SPAN]

I tried to save some xml inside it, and the dynamic content render just wouldnt save. it seems like the attribute can contains html/xml tags.

The trick was to convert my string into Base64.

public string Value;

#region Value64
public string Value64
{
    get
    {
        if (Value == null)
            return null;
        return Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes((string)Value));

    }
    set
    {
        if (value != null)
        {
            
            byte[] toDecodeByte = Convert.FromBase64String(value);

            System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
            System.Text.Decoder utf8Decode = encoder.GetDecoder();

            int charCount = utf8Decode.GetCharCount(toDecodeByte, 0, toDecodeByte.Length);

            char[] decodedChar = new char[charCount];
            utf8Decode.GetChars(toDecodeByte, 0, toDecodeByte.Length, decodedChar, 0);
            string result = new String(decodedChar);
            Value = result;

        }
    }
}
#endregion
#region State (64)
public string State
{
    get
    {
            return Value64;
    }
    set
    {
        Value64 = value;
        
    }
}
#endregion