[c#] Adding and reading from a Config file

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.

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

This question is related to c# configuration-files

The answer is


  1. 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.

  2. 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.


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);