How to avoid multiple class instances?

Question

Here I have a sample code in which i am creating the instances of the class and passing more than one time as a parameter. The thing that is bothering me, is why I have to create multiple instances of a single class in all saperate methods is there any possible way to avoid the repetiton of codes.

  public void method1()
{
   class1 cl= new class1();
   c1.filldata();
   method2(c1);
}
public string method2(class1 c)
{
   class1 c2= new class1();
   c2=c;
   string data =c2.data;
}

 Here in the above code snippet i have instantiated two instance of a class which i want to avoid.

 

NOTE: I can not use parametrised class object that is passed to method2. This is because i need  a new object.