C#•12mo ago

❔ top-level statement

I have a folder where I have 1 cs file and it is working perfect. I want to start working on a new CS file within the same folder and when I try to compile, then it says " Only one compilation unit can have top-level statements". How can I solve this issue?

21 Replies

phaseshift•12mo ago

You need to write classes etc

SinFluxx•12mo ago

https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/tutorials/top-level-statements

Top-level statements - C# tutorial

This tutorial shows how you can use top-level statements to experiment and prove concepts while exploring your ideas

phaseshift•12mo ago

You generally cannot just write code that 'does stuff' outside of a method, outside of a class.
The one file allowed for top level statements is an exception

Bilal Hameed (Nebb engineering)•12mo ago

ok, I need to make method and class?

SinFluxx•12mo ago

Yes, essentially you can only have one file that doesn't contain the class and method declarations

Bilal Hameed (Nebb engineering)•12mo ago

 using System;

public class Program
{
    public class Calculator
    {
        public int Add(int num1, int num2)
        {
            return num1 + num2;
        }
    }

    static void Main()
    {
        Calculator calculator = new Calculator();
        int result = calculator.Add(5, 10);
        Console.WriteLine("The sum is: " + result);
    }
}

 using System;

public class Program
{
    public class Calculator
    {
        public int Add(int num1, int num2)
        {
            return num1 + num2;
        }
    }

    static void Main()
    {
        Calculator calculator = new Calculator();
        int result = calculator.Add(5, 10);
        Console.WriteLine("The sum is: " + result);
    }
}

the console output says vthat I am missing partial modifier on declaration of type 'program' i have tried to make an file with method and class (help from ChatGPT), but it doesnt work can we have an online session?

SinFluxx•12mo ago

Bilal Hameed (Nebb engineering)•12mo ago

but this is the top-level statement file

SinFluxx•12mo ago

Yes, does that mean you have another file?

Bilal Hameed (Nebb engineering)•12mo ago

yes

SinFluxx•12mo ago

what's in that file?

Bilal Hameed (Nebb engineering)•12mo ago

i have 2 cs files

Random random = new Random();
int daysUntilExpiration = random.Next(12);
int discountPercentage = 0;
test.method();
// Your code goes here

if (daysUntilExpiration > 11)
{
    Console.WriteLine("Your subscription will expire soon. Renew now!");
}
else if (daysUntilExpiration > 5)
{
    discountPercentage = 10;
    Console.WriteLine($"Your subscription expires in {daysUntilExpiration} days. Renew now and save {discountPercentage}%!");
}
else if (daysUntilExpiration > 1)
{
    discountPercentage = 20;
    Console.WriteLine($"Your subscription expires in {daysUntilExpiration} days. Renew now and save {discountPercentage}%!");
}
else if (daysUntilExpiration == 1)
{
    discountPercentage = 20;
    Console.WriteLine("Your subscription expires within a day! Renew now and save {discountPercentage}%!");
}
else
{
    Console.WriteLine("Your subscription has expired.");
}


public class class2 {
    {
   
}

}

Random random = new Random();
int daysUntilExpiration = random.Next(12);
int discountPercentage = 0;
test.method();
// Your code goes here

if (daysUntilExpiration > 11)
{
    Console.WriteLine("Your subscription will expire soon. Renew now!");
}
else if (daysUntilExpiration > 5)
{
    discountPercentage = 10;
    Console.WriteLine($"Your subscription expires in {daysUntilExpiration} days. Renew now and save {discountPercentage}%!");
}
else if (daysUntilExpiration > 1)
{
    discountPercentage = 20;
    Console.WriteLine($"Your subscription expires in {daysUntilExpiration} days. Renew now and save {discountPercentage}%!");
}
else if (daysUntilExpiration == 1)
{
    discountPercentage = 20;
    Console.WriteLine("Your subscription expires within a day! Renew now and save {discountPercentage}%!");
}
else
{
    Console.WriteLine("Your subscription has expired.");
}


public class class2 {
    {
   
}

}

this is my main file

SinFluxx•12mo ago

When you have a file that removes the top level statements, that file is assumed to be class Program with a static void Main, so you shouldn't be use that class name in your file that does have top level statements. Also, if these files are completely disconnected then you should probably put them in different Projects

Bilal Hameed (Nebb engineering)•12mo ago

So I need to make a folder everytime I want to a new cs file?

SinFluxx•12mo ago

No, just don't have a file without top level statements, and then create another file with a class Program in it as well, as these will conflict Moving them into separate projects was just a suggestion based on them seeming to be completely unrelated functionality essentially the Main method in your Program class is the entry point for your application, i.e. where the code will start executing from, so you can only have one of these, at this point in time it might be easier to NOT exclude top level statements as it can lead to confusion

Bilal Hameed (Nebb engineering)•12mo ago

so I should include top level-statement

SinFluxx•12mo ago

You don't have to, I just think it helps to avoid confusion when you're starting out

Bilal Hameed (Nebb engineering)•12mo ago

i understand

Bilal Hameed (Nebb engineering)•12mo ago

chef drone builder•12mo ago

If you just want to create one file scripts then i can recommend https://github.com/dotnet-script/dotnet-script

GitHub

GitHub - dotnet-script/dotnet-script: Run C# scripts from the .NET ...

Run C# scripts from the .NET CLI. Contribute to dotnet-script/dotnet-script development by creating an account on GitHub.

Accord•12mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

Gaming

Programming

❔ top-level statement