C#设置xml文件位置

string xmlPath = @"C:\Users\username\Documents\example.xml";

string xmlPath = @"example.xml";

<appSettings>
  <add key="xmlPath" value="C:\Users\username\Documents\example.xml"/>
</appSettings>

string xmlPath = ConfigurationManager.AppSettings["xmlPath"];

OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "XML文件|*.xml";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
    string xmlPath = openFileDialog.FileName;
}