Adding and reading from a Config file

Question

I have created a C# console based project. In that project i have some variables like companyName, companyType which are Strings.

companyName="someCompanyName";
companyType="someCompanyType";

I need to create a config file and read values from it, and then initialize the variables companyName, companyType in the code.

How can i create a config file (or equivalent) ?
How can i read from the config file ?

This [answer](http://stackoverflow.com/a/10718830/205859) may help — Ufuk Hacıoğulları, Jun 02 '12 at 18:28

score 106 · Accepted Answer · edited Jan 31 '20 at 15:37

106

Add an Application Configuration File item to your project (Right -Click Project > Add item). This will create a file called app.config in your project.
Edit the file by adding entries like <add key="keyname" value="someValue" /> within the <appSettings> tag.
Add a reference to the System.Configuration dll, and reference the items in the config using code like ConfigurationManager.AppSettings["keyname"].

edited Jan 31 '20 at 15:37

vwvw

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answered Jun 02 '12 at 18:17

goric

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This no longer works – quest4truth Feb 11 '22 at 19:08

score 27 · Answer 2 · edited Aug 19 '18 at 21:01

27

Configuration configManager = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
KeyValueConfigurationCollection confCollection = configManager.AppSettings.Settings;

confCollection["YourKey"].Value = "YourNewKey";


configManager.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(configManager.AppSettings.SectionInformation.Name);

edited Aug 19 '18 at 21:01

Neeraj Kumar

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answered Jun 02 '12 at 18:26

Matija Grcic

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Some explanation would help. – Tom Gringauz May 30 '17 at 10:23
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The source code defenitely lacks comment. So it does not provide a solution/answer the question imo. – H.Hasenack Sep 03 '18 at 21:48
simple enough though – Xavi May 12 '21 at 20:34

score 14 · Answer 3 · answered Jun 02 '12 at 18:15

Right click on the project file -> Add -> New Item -> Application Configuration File. This will add an app.config (or web.config) file to your project.
The ConfigurationManager class would be a good start. You can use it to read different configuration values from the configuration file.

I suggest you start reading the MSDN document about Configuration Files.

Adding and reading from a Config file

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