Select Folder Path with savefileDialog

Check the FolderBrowserDialog

// Bring up a dialog to chose a folder path in which to open or save a file.
private void folderMenuItem_Click(object sender, System.EventArgs e)
{
    var folderBrowserDialog1 = new FolderBrowserDialog();

    // Show the FolderBrowserDialog.
    DialogResult result = folderBrowserDialog1.ShowDialog();
    if( result == DialogResult.OK )
    {
        string folderName = folderBrowserDialog1.SelectedPath;
        ... //Do your work here!
    }
}

Though an old question,

I didn't like that uglyFolderBrowserDialog, so here's a trick that worked for me, it uses the SaveFileDialog

// Prepare a dummy string, thos would appear in the dialog
string dummyFileName = "Save Here";

SaveFileDialog sf = new SaveFileDialog();
// Feed the dummy name to the save dialog
sf.FileName = dummyFileName;

if(sf.ShowDialog() == DialogResult.OK)
{
    // Now here's our save folder
    string savePath = Path.GetDirectoryName(sf.FileName);
   // Do whatever
}