blocks|key|209916|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|209917|应用程序范围设置是只读的，并且只能在设计时或通过在两个应用程序会话之间更改.exe.config文件来更改。但是，用户范围的设置可以在运行时写入，就像更改任何属性值一样。新值在应用程序会话期间保持不变。通过调用Settings.Save方法，可以在应用程序会话之间保留对用户设置的更改。|blockquote|209918|209919|209920|来源：Using+Settings+in+C#|offset|length|209921|用户设置通常用于持久化用户首选项(例如，应用程序通知首选项等)。应用程序设置通常用于API密钥等项。|209922|正如@kmote所指出的，当用户设置在运行时被修改和持久化(通过settings.Save())时，它们将被写入用户配置文件存储(通常是Windows7和更高版本中的C:\Users**Username\AppData\Local**AppName+)中的文件夹。要以编程方式确定文件的位置，请参阅this+post。|style|CODE|BOLD|209923|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa730869(v=vs.80).aspx|1|https://stackoverflow.com/questions/1075204#1075318^0|0|0|0|0|3|K|0|0|0|W|F|2T|N|45|9|1|0^^$0|@$1|2|3|-4|4|5|6|10|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|11|7|@]|8|@]|9|$]]|$1|D|3|-4|4|5|6|12|7|@]|8|@]|9|$]]|$1|E|3|-4|4|5|6|13|7|@]|8|@]|9|$]]|$1|F|3|G|4|5|6|14|7|@]|8|@$H|15|I|16|1|17]]|9|$]]|$1|J|3|K|4|5|6|18|7|@]|8|@]|9|$]]|$1|L|3|M|4|5|6|19|7|@$H|1A|I|1B|N|O]|$H|1C|I|1D|N|P]]|8|@$H|1E|I|1F|1|1G]]|9|$]]|$1|Q|3|-4|4|5|6|1H|7|@]|8|@]|9|$]]]|R|$S|$4|T|U|V|9|$W|X]]|Y|$4|T|U|V|9|$W|Z]]]]

<blockquote>
 Application-scope settings are read only, and can only be changed at design time or by altering the .exe.config file in between application sessions. User-scope settings, however, can be written at run time, just as you would change any property value. The new value persists for the duration of the application session. You can persist changes to user settings between application sessions by calling the Settings.Save method.
</blockquote>

Source on msdn: <a href="http://msdn.microsoft.com/en-us/library/aa730869(v=vs.80).aspx" rel="noreferrer">Using Settings in C#</a>

User settings are generally of use for persisting user preferences (e.g. app notification preferences etc.). Application settings would generally for items such as API keys etc.

As noted by @kmote, when user settings are modified and persisted at run time (via <code>settings.Save()</code>), they will be written to a folder within User Profile storage (typically C:\Users\Username\AppData\Local\AppName in Windows 7 and above). In order to determine the location of the file programmatically, please see <a href="https://stackoverflow.com/questions/1075204#1075318">this post</a>.

blocks|key|209510|text|基本上，应用程序设置不能在程序运行期间更改，而用户设置可以更改。然后应保存这些用户设置，以便用户在下一次运行应用程序时获得熟悉的体验。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|209511|编辑:例如，您可能使用不同的模块编写应用程序，并且需要确保您的主模块使用安全模块的正确版本。为此，您需要设置一个应用程序范围的设置，例如：|209512|SecurityModuleVersion++string+++++Application++++++v1.21|code-block|syntax|javascript|209513|稍后，当您重构安全模块时，可能会在部署时将该值更改为v1.22，以确保实现了正确的安全性|209514|另一方面，如果你的应用程序有不同的“皮肤”，颜色变化，字体变化等，那么你可以设置一个用户设置，如下所示：|209515|ApplicationSkin++++++++string+++++User++++++++++++++DefaultSkin|209516|然后，当米歇尔更改为她喜欢的皮肤时，应用程序会记住她的设置。这些属性现在可能如下所示：|offset|length|style|BOLD|209517|ApplicationSkin++++++++string+++++User++++++++++++++HelloKittySkin|209518|entityMap^0|0|0|0|0|0|0|P|2|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|F|7|13|8|@]|9|@]|A|$G|H]]|$1|O|3|P|5|6|7|14|8|@$Q|15|R|16|S|T]]|9|@]|A|$]]|$1|U|3|V|5|F|7|17|8|@]|9|@]|A|$G|H]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

Basically, application settings cannot be changed during the running of a program and user settings can. These user settings should then be saved so the user is presented with a familiar experience when (s)he runs the application next.

Edit:
For examples, you might write your application with different modules, and need to ensure that your main module is using the correct version of your security module. For this you would set up an application-scope setting eg:

<pre><code>SecurityModuleVersion string Application v1.21
</code></pre>

Sometime later when you refactor the security module, you might change the value to v1.22 when you deploy to ensure the correct security is being implemented

On the other hand, if your application has different 'skins' with color changes, font changes etc, then you may setup a user setting something like the following:

<pre><code>ApplicationSkin string User DefaultSkin
</code></pre>

Then, when Michelle changes to the skin she prefers, the application remembers her settings. The properties may now look like:

<pre><code>ApplicationSkin string User HelloKittySkin
</code></pre>

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

<a href="https://i.stack.imgur.com/FHMTf.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FHMTf.png" alt="enter image description here"></a>

I have noticed that when I am adding a setting, I can define scope as <code>User</code> or <code>Application</code>. -

<ol>
<li>User</li>
<li>Application</li>
</ol>

If I define setting as <code>User</code> it goes to<code>userSettings</code> section, 
if I define setting as <code>Application</code> it goes to <code>applicationSettings</code> section

App.config

<pre><code>&lt;configuration&gt;

 &lt;userSettings&gt;
 &lt;DemoApp.Properties.Settings&gt;
 &lt;setting name="MySetting1" serializeAs="String"&gt;
 &lt;value&gt;Value1&lt;/value&gt;
 &lt;/setting&gt;
 &lt;/DemoApp.Properties.Settings&gt;
 &lt;/userSettings&gt;

 &lt;applicationSettings&gt;
 &lt;DemoApp.Properties.Settings&gt;
 &lt;setting name="MySetting2" serializeAs="String"&gt;
 &lt;value&gt;Value2&lt;/value&gt;
 &lt;/setting&gt;
 &lt;/DemoApp.Properties.Settings&gt;
 &lt;/applicationSettings&gt;

&lt;/configuration&gt;
</code></pre>

But, these settings can be accessed in the same way from <code>.cs</code> -

Code

<pre><code>string mySetting1 = DemoApp.Properties.Settings.Default.MySetting1;
string mySetting2 = DemoApp.Properties.Settings.Default.MySetting2;
</code></pre>

What is the difference between <code>User</code> and <code>Application</code> scope and under what circumstances one should choose between these two?

App.config: User vs Application Scope

文件存储

我已经在我的项目中添加了App.config文件。我已经在项目>属性>设置面板中创建了两个设置-​​我注意到，当我添加一个设置时，我可以将范围定义为User或Application。-UserApplication如果我将setting定义为User，它将转到userSettings部分，如果我将setting定义为A...

问App.config:用户与应用程序范围
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