Meaning til before the name of a Class in the class body

Question

I really don’t understand certain things. For example, what does this mean:

**~TesteGeral();**

public class TesteGeral : IDisposable
{
   public TesteGeral(){string teste, string user }
   ~TesteGeral();
   //métodos não implementados aqui(não entendi, parece uma interface)
}