validate textbox

Today in C#, I will teach you how to create a program that will validate an inputted textbox using ErrorProvider. In this tutorial, you will know what are the inputs you are going to put in the textbox and it will notify you whatever errors that you might encounter. Now, let's start this tutorial! 1. Let's start with creating a Windows Form Application in C# for this tutorial by following the following steps in Microsoft Visual Studio 2010: Go to File, click New Project, and choose Windows Application. 2.