How to check if Configuration Section exists in .NET Core?

Question

How can you check if a configuration section exists in the appsettings.json in .NET Core?

Even if a section doesn't exist, the following code will always return an instantiated instance.

e.g.

var section = this.Configuration.GetSection<TestSection>("testsection");

Answer 1

Query the children of Configuration and check if there is any with the name "testsection"

var sectionExists = Configuration.GetChildren().Any(item => item.Key == "testsection"));

This should return true if "testsection" exists, otherwise false.