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Compiler Error CS1558

'class' does not have a suitable static Main method

The MainEntryPoint 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.

C#
// 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.  
      }  
   }  
}