C#

public static void asdf() {
   String anotherstring;
   Class1 myObject = new Class1();  // here you create a object reference
   myObject.astring = anotherstring;
}

public void asdf() {   // don't use the static-keyword here
...
}

namespace WindowsFormsApplication3
   {
   class Class1
      {
      public String astring;
      public static void asdf()
         {
         String anotherstring;
         astring = anotherstring; //It doesn't like this
         }
      }
   }

Class1 c = new Classs1();
c.asfd();

public class Demo
    {
    public static string s1 = "Hello";
    public string s2 = "Goodbye";
    }

static void Main()
    {
    Console.WriteLine(Demo.s1);
    }

static void Main()
    {
    Console.WriteLine(Demo.s2);
    }

static void Main()
    {
    Demo d = new Demo();
    Console.WriteLine(d.s2);
    }

Demo d2 = new Demo();