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Remember that ConfigurationManager uses only one app.config - one that is in startup project. If you put some app.config to a solution A and make a reference to it from another solution B then if you run B, app.config from A will be ignored. So for example unit test project should have their own app.config.
Then I decided to remove the key from the app config file and run the app and it still works and rewrites because it's not there as expected. So it's mainly when the computer first reboots and runs the app for the first time and it fails when writing to the app config file.
You can change configuration file schema back to DotNetConfig.xsd via properties of app.config file. To find destination of needed schema you can search it by name or create winforms application, add to project configuration file and in it's properties you'll find full path to file.
Can't write values to the app.config file I have a WPF application and I need to work with app.config file. When I tried to build one by adding a new app. I'll cover the following topics in the code samples below: ConfigurationSettingsAppDomain, Exception, Inner, WPF, and WPF Application.
The config file is also dynamic, so you can change the value of the variable in the config file without compiling and deploying the .NET app. In multi tenancy environment config file can be complicate for deployment, because for each tenant different value must be set for most of the defined variables.
Otherwise you would probably have to write your own class that can use the app.config file. However, you would still not get the immediate changes without rebuilding, and you would have to accept that in Android you would need to have the app.config in the assets folder. 2.
In this tutorial we will learn to read and write multiple data in files in C programming language. In the previous tutorials we have learned how to read and write characters in files in C and how to read and write integers in files in C.In both the cases we worked with single character and integer at a time.
Go to your config file and add a collection. Let’s say it’s a collection of Nodes. We will create a custom section in the config file called CustomConfigSection. We need first to register it in the configSections. Here is the complete config file for our simple example.
To begin this example create a console application and add an App.config file to your project. We are going to use the App.config file to tell our application that it should create a trace listener on start-up. Amend the XML code of your App.config file to look like the below example.
On how to change values in appSettings section in your app.config file: config.AppSettings.Settings.Remove(key); config.AppSettings.Settings.Add(key, value); does the job. Of course better practice is Settings class but it depends on what are you after.