procedural programming in C# leads to CS0116 error

The CS0116 error in C# occurs when you attempt to define a member or method inside a namespace without enclosing it within a class or struct. This error typically indicates that you are writing procedural code in a file intended for object-oriented programming.

To resolve the CS0116 error, you need to ensure that your code is structured within classes or structs. Here are the steps to fix the error:

1. Identify the code causing the error: Review the line number mentioned in the error message and locate the code where the CS0116 error is being raised.

2. Enclose the code within a class or struct: Move the code into an appropriate class or struct. In C#, all members and methods must be defined within classes or structs.

3. Refactor the code: If you are attempting to write procedural code within a C# file, you will need to restructure it to follow object-oriented programming principles. Identify the logical components of your code and encapsulate them within classes or structs with appropriate methods and properties.

4. Ensure correct file structure: Make sure that your file structure aligns with the structure of your classes or structs. Each class or struct should reside in its own file with the same name as the class or struct.

5. Recompile: Once you have made the necessary changes, save the file and recompile your project. The CS0116 error should no longer appear if the code is properly structured within classes or structs.

By following these steps, you can resolve the CS0116 error and ensure that your code is organized correctly within classes or structs, adhering to object-oriented programming principles in C#.