.Net Tips – String.ToTitleCase() extension methods

You can become a serverless blackbelt. Enrol to my 4-week online workshop Production-Ready Serverless and gain hands-on experience building something from scratch using serverless technologies. At the end of the workshop, you should have a broader view of the challenges you will face as your serverless architecture matures and expands. You should also have a firm grasp on when serverless is a good fit for your system as well as common pitfalls you need to avoid. Sign up now and get 15% discount with the code yanprs15!

As you most likely know already, there are ToLower() and ToUpper() methods on the String class in C#, but a method to convert a string to ‘Title Case’ is sadly missing.

Support for this useful conversion exists in the TextInfo class which has a ToTitleCase method, but you can’t instantiate a new instance of the TextInfo type as there is no public constructor. Instead you will need to first create a new CultureInfo object:

var str = "wAr AnD peaCE";
var textInfo = new CultureInfo("en-US").TextInfo;
var titleCaseStr = textInfo.ToTitleCase(str);
Console.WriteLine(titleCaseStr);
/* this outputs
War And Peace
*/

Seeing as the CultureInfo class doesn’t have a parameter-less constructor, it means if you wish to do the above you have to provide a ‘default’ culture. Instead of hard-coding a default culture in your code, I’d recommend using the current culture of the executing thread instead:

var cultureInfo = System.Threading.Thread.CurrentThread.CurrentCulture;

That way, if you don’t care about the culture info you’re using, you will just default to whatever culture info your current thread is using, much cleaner than the alternative!

Better still, if you’re gonna be needing title case conversion often, why not just add some extension methods to the Sting type:

public static class StringExtension
{
    /// <summary>
    /// Use the current thread's culture info for conversion
    /// </summary>
    public static string ToTitleCase(this string str)
    {
        var cultureInfo = System.Threading.Thread.CurrentThread.CurrentCulture;
        return cultureInfo.TextInfo.ToTitleCase(str.ToLower());
    }

    /// <summary>
    /// Overload which uses the culture info with the specified name
    /// </summary>
    public static string ToTitleCase(this string str, string cultureInfoName)
    {
        var cultureInfo = new CultureInfo(cultureInfoName);
        return cultureInfo.TextInfo.ToTitleCase(str.ToLower());
    }

    /// <summary>
    /// Overload which uses the specified culture info
    /// </summary>
    public static string ToTitleCase(this string str, CultureInfo cultureInfo)
    {
        return cultureInfo.TextInfo.ToTitleCase(str.ToLower());
    }
}

You may have noticed from the remarks in the MSDN page for the TextInfo.ToTitleCase method that the method doesn’t provide proper casing to convert a word that is entirely uppercase, such as an acronym.

It’s for this reason that I have added the ToLower() call in each of the above extension methods.

Liked this article? Support me on Patreon and get direct help from me via a private Slack channel or 1-2-1 mentoring.
Subscribe to my newsletter


Hi, I’m Yan. I’m an AWS Serverless Hero and I help companies go faster for less by adopting serverless technologies successfully.

Are you struggling with serverless or need guidance on best practices? Do you want someone to review your architecture and help you avoid costly mistakes down the line? Whatever the case, I’m here to help.

Hire me.


Skill up your serverless game with this hands-on workshop.

My 4-week Production-Ready Serverless online workshop is back!

This course takes you through building a production-ready serverless web application from testing, deployment, security, all the way through to observability. The motivation for this course is to give you hands-on experience building something with serverless technologies while giving you a broader view of the challenges you will face as the architecture matures and expands.

We will start at the basics and give you a firm introduction to Lambda and all the relevant concepts and service features (including the latest announcements in 2020). And then gradually ramping up and cover a wide array of topics such as API security, testing strategies, CI/CD, secret management, and operational best practices for monitoring and troubleshooting.

If you enrol now you can also get 15% OFF with the promo code “yanprs15”.

Enrol now and SAVE 15%.


Check out my new podcast Real-World Serverless where I talk with engineers who are building amazing things with serverless technologies and discuss the real-world use cases and challenges they face. If you’re interested in what people are actually doing with serverless and what it’s really like to be working with serverless day-to-day, then this is the podcast for you.


Check out my new course, Learn you some Lambda best practice for great good! In this course, you will learn best practices for working with AWS Lambda in terms of performance, cost, security, scalability, resilience and observability. We will also cover latest features from re:Invent 2019 such as Provisioned Concurrency and Lambda Destinations. Enrol now and start learning!


Check out my video course, Complete Guide to AWS Step Functions. In this course, we’ll cover everything you need to know to use AWS Step Functions service effectively. There is something for everyone from beginners to more advanced users looking for design patterns and best practices. Enrol now and start learning!