c# if file doesn't exist create it
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.");
}