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Convert nullable value to string

using System; using System.ComponentModel;     class NullableMembers     {         static void Display(Nullable<int> x)         {             Console.WriteLine("HasValue: {0}", x.HasValue);             if (x.HasValue)             {                 Console.WriteLine("Value: {0}", x.Value);                 Console.WriteLine("Explicit conversion: {0}", (int)x);             }             Console.WriteLine("ToString(): \"{0}\"", x.ToString());         }         static void Main()         {             Nullable<int> x = 5;             x = new Nullable<int>(5);             Console.WriteLine("Instance with value:");             Display(x);             x = new Nullable<int>();             Console.WriteLine("Instance without value:");             Display(x);         }     }