private void btoper_Click(object sender, EventArgs e)
{
Encoding en = Encoding.Default;
StringBuilder strb = new StringBuilder();
string path = tBdir.Text;
string spath = tBsave.Text;
List <string> paths = new List <string>();
List <string> files = new List <string>();
FileSys.GetAllDirFiles(path, ref files, ref paths, "*.txt");
for (int i = 0; i < files.Count; i++)
{
string fpath = files[i];
en = GetFileEncoding(fpath);
StreamReader rd = new StreamReader(fpath, en);
string StrRead = rd.ReadToEnd().ToString();
StrRead = Filtrate(StrRead);
strb.Append(StrRead);
}
FileStream fs = File.Create(spath);
byte[] bContent = en.GetBytes(strb.ToString());
fs.Write(bContent, 0, bContent.Length);
fs.Close();
}