How to check if Configuration Section exists in .NET Core?
Since .NET Core 2.0, you can also call the ConfigurationExtensions.Exists extension method to check if a section exists. var section = this.Configuration.GetSection(“testsection”); var sectionExists = section.Exists(); Since GetSection(sectionKey) never returns null, you can safely call Exists on its return value. It is also helpful to read this documentation on Configuration in ASP.NET Core.