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Conversions of Classes (Reference Types) to an Interface the Object Might Implement

using System; interface Printable {     string Print(); } class NonPrintablePaper {     public NonPrintablePaper(int value)     {         this.value = value;     }     public override string ToString()     {         return(value.ToString());     }     int value; } class PrintablePaper: Printable {     public PrintablePaper(string name)     {         this.name = name;     }     public override string ToString()     {         return(name);     }     string Printable.Print()     {         return("print...");     }     string name; } class MainClass {     public static void TryPrinting(params object[] arr)     {         foreach (object o in arr)         {             Printable printableObject = o as Printable;             if (printableObject != null)             Console.WriteLine("{0}", printableObject.Print());             else             Console.WriteLine("{0}", o);         }     }     public static void Main()     {         NonPrintablePaper s = new NonPrintablePaper(13);         PrintablePaper c = new PrintablePaper("Tracking Test");         TryPrinting(s, c);     } } 13 print...