C #12-12-Why must the mian function be static?

C # Program At the beginning of the startup, there will be a unique entry function main (), rather than a static member, also known as an instance Member, which must act on the instance. When the program starts running, no instances are created, so instance members, including non-static main methods, cannot be called. To be able to execute the main method at the beginning of the program, it must be declared as static.
By the way, the members called in the main method must also be static unless an instance is created.
For example:

 Namespace Lover_p.test {
 Public   Class Test {
 Public   Void Instancemethod (){} //  Instance Member (non-static)  
  Public  Static   Void Staticmethod {} //  Type member (static)  
  Public   Static   Void Main (){
Instancemethod (); //  Error! The instance Member is called, but no instance is created at this time.  
 Staticmethod (); //  Correct! You can call static members.  
 Test sometest =New Test (); //  Create an instance of this type  
 Sometest. instancemethod (); //  You can call the instance members on this instance.  
 Sometest. staticmethod (); //  Additionally, it is also incorrect to call static members on an instance!  
 }
}
}