Error: Program.Main() Has More Than One Entry - Adding New Class to C# Project

├Źndice
  1. Understanding the Error: Program.Main() Has More Than One Entry
  2. Resolving the Error: Adding a New Class to Your C# Project
  3. Conclusion

Understanding the Error: Program.Main() Has More Than One Entry

When working with C# projects, it's not uncommon to come across errors that can be difficult to understand. One such error is "Program.Main() has more than one entry point defined." This error occurs when you have multiple classes with a Main() method in your project.

The Main() method is the entry point of a C# program. It's the method that gets executed first when you run your program. If you have multiple Main() methods in your project, the compiler won't know which one to use as the entry point, hence the error message.

Resolving the Error: Adding a New Class to Your C# Project

To resolve this error, you need to ensure that your project has only one Main() method. One way to achieve this is by adding a new class to your project.

Here's what you need to do:

  1. Right-click on your project in the Solution Explorer and select "Add" > "Class".
  2. Name the new class something like "Program2.cs".
  3. Open the new class file and add a Main() method:
  4. class Program2
      {
          static void Main()
          {
              Console.WriteLine("Hello, world!");
          }
      }
  5. Ensure that your original Main() method is now in a class called "Program".
  6. Build your project and run it. The error should no longer occur.

Conclusion

The "Program.Main() has more than one entry point defined" error can be frustrating, but it's easily resolved by adding a new class to your project. By following the steps outlined above, you can ensure that your C# program has only one entry point and runs smoothly.

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