CSX File Extension
Visual C# Script
- File Type csx
- Developer Microsoft
- Popularity
- Application Notepad++
- Category Developer Files
- Format Text
What is a CSX file?
Visual C# Script, identified by the CSX extension, is a Developer Files type and includes 1166 files.
The Visual C# Script (CSX), created by Microsoft, is one of file format they developed, and they also built 242 programs to support them.
CSX file support extends to various operating systems, including Windows, Linux and Mac OS. When working with CSX files, you can rely on 5 programs, including Microsoft Visual Studio, Notepad++ and Sublime Text.
Programs that support CSX files
How to open a CSX file?
If you can’t open a CSX file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.
When it comes to opening and working with CSX files, Microsoft Visual Studio, Notepad++ and Sublime Text are the top choices for users. To install the updated version of Notepad++, simply go to the Notepad++ Team site and download the installer compatible with all major platforms.
Once the process is complete, Notepad++ should take over as the default application for CSX files.
Set Notepad++ as the default CSX program
Changing Default Programs in Windows
- Right-click on your CSX file, then choose the "Open with" option and select "Choose another application" from the available options;
- In the pop-up window, select the Notepad++ application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening CSX files.
Change Default Program on Mac
- Right click or Control + left click on the desired CSX file;
- Select "Open in application" and click "Other";
- At the bottom of the window, you will find the "Enable" menu. Default, will be set to "Recommended Programs";
- Choose "All Programs" in this menu and search for Notepad++. Check the box next to "Always open in app" to make it the default program.
How to edit a CSX file?
To edit CSX files, it is essential to install software that supports not only viewing but also editing the developer files. Online CSX editors provide limited functionality compared to full-featured software for Visual C# Script.
List of Top CSX editors 2026
Based on the criteria above, here is a selection of CSX editors you can use.
| CSX Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| PSPad | Jan Fiala | Windows | 4.7 out of 5 (41 review) |
| Notepad++ | Notepad++ Team | Windows | 4.6 out of 5 (37 reviews) |
| Sublime Text | Sublime HQ Pty | Windows, Mac OS, Linux | 4.6 out of 5 (39 reviews) |
| Microsoft Visual Studio | Microsoft | Windows, Mac OS, Linux | 4.2 out of 5 (35 reviews) |
| Atom | - | Windows, Mac OS, Linux | 4.1 out of 5 (36 reviews) |
Solve problems with CSX files
Rest assured, any issues with CSX files can typically be addressed with simple software adjustments. See the tips below for help.
Why does Notepad++ stop responding or crash intermittently?
Notepad++ crashes can be caused by outdated software. Keep your Notepad++ Team products up to date by installing the latest updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
What are the best practices for repairing a CSX file that has gone bad?
Use a data recovery program to open the damaged CSX file and from the menu choose "Repair" function to start the repair process. Allow the recovery process to complete, which will automatically repair the damaged developer files.
What are the warning signs that my CSX file may be corrupted?
Common indications of damaged CSX developer files are:
- Error messages appear during the course of working with the file;
- Editing the archive in Microsoft Visual Studio results in slow or unresponsive behavior;
- Opening the file results in an error or a failed attempt;
- Unexpected expansion of the total size of the CSX file;
- Opening the file in Notepad++ or other programs causes them to hang or crash;