Troubleshooting “program does not contain a static 'Main' method” when it clearly does…?

Question

My MS Visual C# program was compiling and running just fine. I close MS Visual C# to go off and do other things in life.

I reopen it and (before doing anything else)

Answer 1

My problem is that I accidentally set the arguments for Main

static void Main(object value)

thanks to my refactoring tool. Took couple mins to figure out but should help someone along the way.

Answer 2

What I found is that the Program.cs file was not part of the solution. I did an add existing item and added the file (Program.cs) back to the solution.

This corrected the error: Error 1 Program '..... does not contain a static 'Main' method suitable for an entry point

Answer 3

I had this error and solved by this solution.

--> Right click on the project

--> and select "Properties"

--> then set "Output Type" to "Class Library".

Answer 4

What worked for me: Close MS Visual Studio, then start Visual Studio and open the solution. The error message was then gone.

Answer 5

I had this problem and its because I wasnt using the latest version of C# (C# 7.3 as of writing this) and I had to change the below internal access modifier to public.

internal class Program
 {
    public static void Main(string[] args)
    {
        //My Code
    }
  }

or ammend the .csproj to use the latest version of C# (this way meant I could still keep the above class as internal):

<PropertyGroup>
    <LangVersion>latest</LangVersion>
    <NoWin32Manifest>true</NoWin32Manifest>
</PropertyGroup>

Answer 6

It is important that the Main method is placed in the class that is properly configured in Visual Studio as a start-up object:

• Right-click your project in project explorer; choose "Properties..."
• In the properties dialog, choose "Application" tab
• In the application tab, choose SimpleAIMLEditor.Program from the drop-down for your start-up object

Now run your application again. The error will disappear.