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C# – Using String.Join()

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You can use String.Join() to convert a collection of items to a string with a separator (such as a comma). Here’s an example of using String.Join() to convert a List of strings to a comma-separated string: This results in the following comma-separated string: String.Join() can be used on wide variety of input: I’ll show a … Read more

C# – Convert a List to a string

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There are two good ways to convert a List<T> to a string: I’ll show examples of both approaches. Using String.Join() String.Join() is the simplest way to convert a List to a string. With this method, you pass in the List and a delimiter and it outputs a string. You can use any delimiter you want. … Read more

C# – How to unit test console output

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There’s two ways to unit test code that writes to the console (Console.WriteLine() / Console.Write()): In this article, I’ll show how to do both options. Option 1 – Capture the output with Console.SetOut() Let’s say you want to unit test the following code that outputs to the console with Console.WriteLine(): You can unit test this … Read more

C# – Convert a list of strings into a set of enums

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Let’s say you have a list of HTTP status codes that you read in when the service starts up (perhaps from appsettings.json or from the database). Whenever you send an HTTP request, you want to check if the returned status code is in this list of status code. To make things more efficient, you want … Read more