Example of multiple Main() methods in C#.Net:

C# Syntax:

using System;

namespace m1

{

    class c1

    {

        public static void Main()

        {

            Console.WriteLine("this is from the class 1 of the namespace 1");

            Console.ReadLine();

        }

    }

    class c2

    {

        public static void Main()

        {

            Console.WriteLine("this is from the class 2 of the namespace 2");

            Console.ReadLine();

        }

    }

}

How to run in console:

C:\>csc manyMain.cs

Microsoft (R) Visual C# 2008 Compiler version 3.5.21022.8

for Microsoft (R) .NET Framework version 3.5

Copyright (C) Microsoft Corporation. All rights reserved.

manyMain.cs(16,20): error CS0017: Program 'c:\manyMain.exe' has more than one

        entry point defined: 'm1.c1.c2.Main()'.  Compile with /main to specify

        the type that contains the entry point.

manyMain.cs(7,20): error CS0017: Program 'c:\manyMain.exe' has more than one

        entry point defined: 'm1.c1.Main()'.  Compile with /main to specify the

        type that contains the entry point.

C:\>csc manyMain.cs /main:m1.c1

Microsoft (R) Visual C# 2008 Compiler version 3.5.21022.8

for Microsoft (R) .NET Framework version 3.5

Copyright (C) Microsoft Corporation. All rights reserved.

C:\>manyMain

this is from the class 1 of the namespace 1