In most of the cases we usually creates a private variable and its corresponding public properties and uses them for performing our functionalities.

Everyone has different approach like some people uses properties every where and some uses private variables within a same class as they are private and opens it to be used by external environment by using properties.

Suppose I takes a scenario say insertion in a database. I creates some parameters that need to be initialized.

I creates 10 private variables and their corresp public properties which are given as

private string name;
public string Name
   {
     get{return name;}
      set{name=value;}
   }

and so on. In these cases mentioned above, what should be used internal variables or properties.

And in those cases like

public string Name
   {
     get{return name;}
     set{name=value>5?5:0;} //or any action can be done. this is just an eg.
   }

In such cases what should be done.