Compiler Error CS5001

Program does not contain a static 'Main' method suitable for an entry point

This error occurs when no static Main method with a correct signature is found in the code that produces an executable file. It also occurs if the entry point function, Main, is defined with the wrong case, such as lower-case main. For information about the rules that apply to the Main method, see Main() and Command-Line Arguments.

If the Main method has an async modifier, make sure that the selected C# language version is 7.1 or higher and to use Task or Task<int> as the return type.

The Main method is only required when compiling an executable file, that is, when the exe or winexe element of the TargetType compiler option is specified. The following Visual Studio project types specify one of these options by default:

• Console application
• ASP.NET Core application
• WPF application
• Windows Forms application

Example

The following example generates CS5001:

// CS5001.cs
// CS5001 expected when compiled with -target:exe or -target:winexe
public class Program
{
   // Uncomment the following line to resolve.
   // static void Main() {}
}