C FUNCTION

It sounds like you are looking for a way to replicate the functionality of GW BASIC's GOSUB and branching logic in C#. In C#, you can achieve similar behavior using methods and conditional statements. Let's break it down:

1. Using Methods: In C#, you define methods to encapsulate blocks of code. Each method can perform a specific task, similar to a subroutine in BASIC.

2. Conditional Branching: C# utilizes conditional statements like `if`, `else if`, and `switch` to control the flow of program execution based on conditions, similar to the branching logic in BASIC.

To replicate the GW BASIC functionality in C#, you can structure your code something like this:

using System;

class Program
{
    static void Main()
    {
        int module = 3;

        Line1234(module); // Call the method corresponding to line 1234 based on module value
    }

    static void Line1234(int module)
    {
        switch (module)
        {
            case 1:
                // Do something for module 1
                break;
            case 2:
                // Do something for module 2
                break;
            case 3:
                Line5432(); // If module is 3, branch to line 5432
                break;
            default:
                // Handle other cases
                break;
        }

        Console.WriteLine("Returning to line 1234 in C#");
    }

    static void Line5432()
    {
        Console.WriteLine("Executing code for line 5432");
    }
}

In this example, based on the value of the `module` variable, the program will execute specific code blocks similar to branching logic in GW BASIC. The `switch` statement is used to determine the action based on the value of `module`.

Remember, C# is a powerful language with different constructs compared to GW BASIC, so adapting the exact behavior might require a bit of restructuring. Let me know if you need further clarification or additional assistance on this topic!