将文件保存到MyDocuments + App文件夹

Question

我试图将我的.NET应用程序设置文件保存到用户的%MyDocument%\ MyApplication文件夹,但我不知道如何检查现有的文件夹\文件,并在保存时创建或附加文件夹\ file.我不想打开saveFileDialog,因为我需要文件在所有用户计算机上的相同位置.这是我到目前为止所做的,但它不起作用.任何帮助,将不胜感激:

var saveSettings = settingsList.text;  //assign settings to a variable
saveSettings = Regex.Replace(saveSettings, @"\s+", "").Trim() + Environment.NewLine; //remove any extra spaces and add a carriage return so that each setting is on a new line            

var fileName = string.Format("{0}\\{1}", Environment.SpecialFolder.MyDocuments + "\\MyApp\\", "settings.dat");  //generate path to settings.dat
File.AppendAllText(fileName, saveSettings);  //save settings.dat

Answer 1

string path = System.IO.Path.Combine(Environment.GetFolderPath(
    Environment.SpecialFolder.MyDoc??uments),"MyApp","settings.dat");

if(Directory.Exists(path))
{
    //Exists
}
else
{
    //Needs to be created
}