Why is only a parameter-less Main method considered as a "valid startup object" for a C# project?

I downloaded a zip of source files containing a C# project with multiple entry points / Main methods. Since I wanted to tinker around, I created another one like this in a new type/class ``` class MyExperiments { static void Main(String[] args) { // do something } } ``` then I switched to project properties. Simply switch the startup object to MyExperiments eh? To my surprise, the dropdown didn't have it. I rebuilt, made the method public, tried a whole lot of stuff.. but to no avail. Finally I edited the .csproj manually in notepad and then it worked. More tinkering around, I removed the parameters to make it ``` static void Main() ``` and now VS Project properties could 'see' the startup object. So now I could select it using the dropdown. I then added the String[] back and everything still worked. Seems a bit weird to me (because the most common form is a Main method with parameters for command line args from the C/C++ times). MSDN says the dropdown will contain valid startup objects if they exist in your project.