The File Extensions Database

.CS File Extension

  • Developer by: Microsoft
  • Category: Developer Files
  • Format: Text

What is an .CS file?

.CS is C# Source Code File

A CS file is a source code file written in C# (pronounced "C Sharp"), an object-oriented programming language created by Microsoft for use with the .NET Framework. It is used for developing a range of applications, from simple desktop programs to applications for distributed environments.

CS files are often edited with Visual C#, a component of Microsoft Visual Studio. But, they can also be edited with a variety of other source code editors that feature syntax highlighting as well.

NOTE: When C# programs are compiled, they can then be run by the Common Language Runtime (CLR), which is included with the .NET Framework.

Programs that open C# Source Code File
File Viewer Plus
Microsoft Visual Studio 2017
IC Code SharpDevelop
Adobe Dreamweaver CC 2019
ES-Computing EditPlus
Microsoft Visual Studio Code
Adobe Dreamweaver CC 2019
Microsoft Visual Studio Code
Microsoft Visual Studio Code
File Type 2 CLEO Custom Script
Developer by: Rockstar Games Category: Game Files

Custom script written for CLEO 3, a third-party scripting engine for Grand Theft Auto: San Andreas (GTA SA); allows players to expand the capabilities of the game using custom functions called "opcodes;" may be created with Sanny Builder, a GTA mod utility.

In order to use a CS file with GTA SA, it must be stored in the "game\CLEO" folder.

Programs that open CLEO Custom Script
Sanny Builder
Rockstar Games Grand Theft Auto: San Andreas
File Type 3 ColorSchemer Studio Color Scheme
Developer by: CHROMAom Category: Data Files Format: Binary

File created by ColorSchemer Studio, a program used for developing color palettes for websites, magazines, home decoration, and other target mediums; saves the user's color schemes, which often contain complementary colors that are matched with one another on the color spectrum.

NOTE: CHROMAom ColorSchemer Studio has been discontinued.

How to solve problems with CS files

  • Associate the CS file extension with the correct application. On :
    Windows: Right click on any CS file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CS files". Mac: Right click (or Ctrl-click) the CS file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .CS is C# Source Code File. Because only the current version supports the latest CS file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .CS is C# Source Code File update.
  • To make sure that your CS file is not corrupted or virus-infected, get the file again and scan it with antivirus software.