.net App.config：用户与应用程序范围

I have added App.config file in my project. I have created two settings from Project > Properties > Settings panel -

我注意到，当我添加一个设置时，我可以将范围定义为用户或应用程序-

1. 用户
2. 应用程序

If I define setting as 用户 it goes touserSettings section,
if I define setting as 应用程序 it goes to applicationSettings section

App.config

<configuration>

    <userSettings>
        <DemoApp.Properties.Settings>
            <setting name="MySetting1" serializeAs="String">
                <value>Value1</value>
            </setting>
        </DemoApp.Properties.Settings>
    </userSettings>

    <applicationSettings>
        <DemoApp.Properties.Settings>
            <setting name="MySetting2" serializeAs="String">
                <value>Value2</value>
            </setting>
        </DemoApp.Properties.Settings>
    </applicationSettings>

</configuration>

但是，这些设置可以通过相同的方式从.cs-

Code

string mySetting1 = DemoApp.Properties.Settings.Default.MySetting1;
string mySetting2 = DemoApp.Properties.Settings.Default.MySetting2;

用户和应用程序范围之间有什么区别？在什么情况下应该在这两者之间进行 Select ？