Error CS5001: program does not contain a static 'main' method suitable

That error is a C# compiler error but your question is tagged C++ 14. The compiler is saying that it cannot find a suitable entry point for the program.

In C#, the Main method must be static and should have one of the following signatures:

public static void Main()
public static void Main(string[] args)
public static int Main()
public static int Main(string[] args)

Your code snippet seems to be a mix of C# and C++ syntax. In C# it should be more like this :

using System;

class Program
{
    [STAThread]
    public static int Main(string[] args)
    {
        // Your code here
        Console.WriteLine("Hello, World!");
        return 0;
    }
}

If you're working with C++, the entry point should be int main(int argc, char **argv) without the [STAThread] attribute, which is specific to C# :

#include <iostream>

int main(int argc, char **argv)
{
    // Your code here
    std::cout << "Hello, World!" << std::endl;
    return 0;
}

M