unity CS1513

Compiler error CS1513
In this case, there is a brace missing }

Usually, the script editor will report an error , There are also some special cases where the script editor will not report an error , But there will be problems when packing
for example

// CS1513 
namespace y   // CS1513, no close curly brace 
{
      
   class x  
   {
      
      public static void Main()  
      {
      
      }  
   }  
#if UNITY_EDITOR
}
#endif