What is the best way to get data from app.config?

Question

Over time, I used:

ConfigurationManager.ConnectionStrings["sqlconnectionstring"].ConnectionString

to get the connection string from the app.config file

<configuration>
   <connectionStrings>
       <add name="sqlconnectionstring" connectionString="Data  Source=ggg;Initial Catalog =DB;User ID=sa;Password=sa" />
   </connectionStrings>
</configuration>

Recently, I found that I can create a string using

global::myProj.Properties.Settings.Default.sqlconnectionstring;

• What is the difference?
• Is it possible to access the key in appSetting?
• Why don't I need to import System.Configuration?

Thanks Asaf

Answer 1

Material global::myProj.Properties.Settings.Default.sqlconnectionstring;is created by the parameter constructor in Visual Studio.

Settings can be found in the solution explorer under "Properties-> Network Settings." Type type label methods are automatically generated for all your properties defined in the parameter constructor.

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Answer 2

, global::myProj.Properties.Settings.Default Visual Studio, . , app.config.

, System.Configuration , System.configuration.dll. , System.Configuration (, System.dll), .

ConfigurationManager System.configuration.dll. , , .

appSetting app.config, , ConfigurationManager. , Visual Studio , global::myProj.Properties.

Answer 3

global::, , .

# Properties.Settings.Default .