Fixing return errors

using System;

namespace ReturnErrors
{
  class Program
  {
    static void Main(string[] args)
    {
      Console.WriteLine(DecoratePlanet("Mars"));
      Console.WriteLine("Is Pluto really a dwarf...?");
      Console.WriteLine(IsPlutoADwarf());
      Console.WriteLine("Then how many planets are there in the galaxy...?");
      Console.WriteLine(CountThePlanets());
    }

    static string DecoratePlanet(string planet)
    {
       return $"*..*..* Welcome to {planet} *..*..*";
    }

    //takes no arguments
    //not to create variable and use them before declaration
    static bool IsPlutoADwarf()
    {
      return true;
    }

    static string CountThePlanets()
    {
      return "8 planets, usually";
    }
  }
}

/*
For IsPlutoADwarf() method:
Steps is to
1. define a variable
2. set a value to it (can be in the same line as step 1)
3. then return its value.

DO NOT do all that in just one line of code.
*/