C#中点另存为的的那个选择路经的是怎么调出来的？

看了这个，我想就不要解释了
//get save file name
private string GetSaveFile()
{
SaveFileDialog saveFile = new SaveFileDialog();
saveFile.Title = "save file";
saveFile.OverwritePrompt = true;
saveFile.CreatePrompt = true;
saveFile.AddExtension = true;
saveFile.Filter = "file(*.txt)|*.txt|all file(*.*)|(*.*)";

if (saveFile.ShowDialog() == DialogResult.OK)
{
return saveFile.FileName;
}
else
{
return null;
}
}
自己运行下就行了

SaveFileDialog控件