Introduction
This article will examine entry points in C# programs, and the possible errors you can come across. The function to
be called in any C# program is Main. We can have as many as four different ways
to declare Main in our program. They are as follows:
static void Main() {...}
static int Main() {...}
static void Main(string[] a) {...}
static int Main(string[] args) {...}
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Note
TheString and string words can be used
interchangably; string is simply an alias of the String
object.
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The operating system calls Main and waits for it to return a value. This value
denotes the success or failure of the program.
Main can either return a number or result in no return value, that is, void.
If it returns an int, by convention, a value of zero means success and any other
value indicates an error. No international authority can standardize the error
numbers, it largely depends on the programmer himself.