Compiler Error CS1558

'class' does not have a suitable static Main method

The /main compiler option specified a class in which to look for a Main method. However, the Main method was not defined correctly.

The following example generates CS1558 because of invalid return type.

// CS1558.cs
// compile with: /main:MyNamespace.MyClass

namespace MyNamespace
{
   public class MyClass
   {
      public static float Main() 
      {
         return 0.0; // CS1558 because the return type is a float.
      }
   }
}