How to format data

        List<double> myList = new List<double>();
        myList.Add(0.1234);
        myList.Add(99);
        myList.Add(12.1234);
        myList.Add(54.98);
        foreach (double d in myList)
        {
            string First = string.Format("{0:0.00%}", d); //Multiply value by 100
            Console.WriteLine(First);                    
            string Second = string.Format("{0:P}", d);//Multiply value by 100
            Console.WriteLine(Second);  
            string Third = string.Format("{0:P}%", d.ToString());//Use this One 
            Console.WriteLine(Third);  
            string Four = d.ToString() + "%"; //Not a good idea but works
            Console.WriteLine(Four);
            Console.WriteLine("=====================");  
        }

        Console.ReadLine();

{0: P} 100, , % , TOString, {0: }