ream(ms, des.CreateDecryptor(),CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder(); //建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
///
/// 检查己加密的字符串是否与原文相同
///
public bool ValidateString(string EnString, string FoString, int Mode)
{
switch (Mode)
{
default:
case 1:
if (Decrypt(EnString,_QueryStringKey) == FoString.ToString())
{
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