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string temp = AppDomain.CurrentDomain.BaseDirectory;
string sPath = Path.Combine(temp, "file.txt");
bool fileExist = File.Exists(sPath);
if (fileExist) {
Console.WriteLine("File exists.");
}
else {
using (File.Create(sPath)) ;
Console.WriteLine("File does not exist.");
}
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string rootPath = Path.GetPathRoot(Environment.GetFolderPath(Environment.SpecialFolder.System));
rootPath += "MTN";
if (!(File.Exists(rootPath)))
{
File.CreateText(rootPath);
}