C#•2y ago

❔ Only one compilation unit can have top-level statements. [C# start]

using VS code, just created new file apart from program.cs and got this error

17 Replies

then, dont use top level statements there, but normal classes

public class AClassInYourOtherFile
{
  public static void DoSomething()
  {
    // your code for this method
  }
}

public class AClassInYourOtherFile
{
  public static void DoSomething()
  {
    // your code for this method
  }
}

for example if ur Program.cs looks like this for example:

using System;

Console.WriteLine("hello world");

using System;

Console.WriteLine("hello world");

its nothing different than that it automatically will be converted to

using System;

public class Program
{
  public static void Main(string[] args)
  {
    Console.WriteLine("hello world");
  }
}

using System;

public class Program
{
  public static void Main(string[] args)
  {
    Console.WriteLine("hello world");
  }
}

in the end. top level statements are to get rid of that boiler plate code also for beginners i would recommend using Visual Studio, not Visual Studio Code if possible

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

im so confused, sorry Im so new to C# my code doesnt have "using system:"

Thinker•2y ago

In every C# project, there is one file that will be run at the start of your program - Program.cs. You cannot have multiple of these files, there can only be one.

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

ok so what if i want to write a new code but want to keep my old one

Thinker•2y ago

You create a new project

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

how do u do that on vs code?

Thinker•2y ago

Same way you created your current project dotnet new console presumably

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

ok but when i did that it just runs my original project, not my new one @thinker227 what should i do? @cap5lut ???

Thinker•2y ago

Go into your new project in the terminal and run dotnet run

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

what if i want to run it in terminal? does that not work?

Thinker•2y ago

It does

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

in terminal on my mac as in externally? whatever, ill just run in app

Thinker•2y ago

Well, any terminal will work

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

ok its fine i think I was running it wrong can i ask u if I have any more questions as I am very new to C# and coding in generall and you seem like you know what your doing

Thinker•2y ago

You can always ask in #help or #help-0 catlurk

𝔎𝔦𝔰𝔰_𝔐𝔶_𝔄𝔵𝔢OP•2y ago

Accord•2y 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.

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❔ Only one compilation unit can have top-level statements. [C# start]