WPF select Folder

The effect is as shown in the picture

Use FolderBrowserDialog

System.Windows.Forms.FolderBrowserDialog dialog = new System.Windows.Forms.FolderBrowserDialog();
System.Windows.Forms.DialogResult result = dialog.ShowDialog();

if (result == System.Windows.Forms.DialogResult.Cancel)
{
    return;
}
selectFolrderPathTextBlock.Text = dialog.SelectedPath.Trim();

Use FolderBrowserDialog

// quote WindowsAPICodePack
var dialog = new CommonOpenFileDialog();
dialog.IsFolderPicker = true;
CommonFileDialogResult result = dialog.ShowDialog();
if (result == CommonFileDialogResult.Ok)
{
    selectFolrderPathTextBlock.Text = dialog.FileName;
}

Sample code

SelectFolder

Reference material

OpenFileDialog In WPF
C# OPENFILEDIALOG Open the file dialog （ Detailed explanation ）