Visual Basic File Duplicate Line Remover

Introduction: Hello, In this tutorial we will be making a simple duplicate line remover. This is made for text file lines but can be easily modified for many other purposes such as .csv duplicate value removers. Steps of Creation: Step 1: First we will create a new form and add: 1 - Button - To begin the duplicate line remover. 1 - Checkbox - To check if the program should overwrite the opened file Step 2: Now lets add a script to create OpenFileDialog to select the file to remove duplicate lines from: Step 3: Next let's create a new String List and add every line from the file to it. As we add them we will compare the line to the already added lines and if the line is not already added we will add it! Step 3: Finally, let's create a SaveFileDialog if the Checkbox to overwite the file is not checked, otherwise we will write the values in the String List "lines" to the file we opened: Project Completed! That's it! Below is the source code and you can download the project from the attached files below.