C#

static void Main()<br />
    {<br />
      Application.EnableVisualStyles();<br />
      Application.SetCompatibleTextRenderingDefault(false);<br />
      CreateForm(true);<br />
      Application.Run();<br />
    }<br />
<br />
    public static void CreateForm(bool blIsClosing)<br />
    {<br />
      frmMain frmFace = new frmMain();<br />
<br />
      if (blIsClosing == true)<br />
      {<br />
        frmFace.Close()<br />
      }<br />
    }

public class ClassA
{
// other junk
}
public class ClassB
{
  // other junk

  public string GetClassName(ClassA classA)
  {
    classA.OtherMethodClass();
    return classA.ToString();
  }
}
public class ClassC
{
// other junk
  ClassA a = new ClassA();
  // set a's properties
  ClassB b = new ClassB();
  string x = b.GetClassName(a);
  Console.WriteLine(x);
}