IndexOf와 static 한정자

IndexOf는
static 한정자를 사용하므로
인스턴스.IndexOf가 아니라
원형
class명.IndexOf로 접근해야합니다.

ex)

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace Study_04 {     class ConsoleApp     {         public ConsoleApp()         {             Console.WriteLine("Hello World!");               //실습 시작             string[] arrNames = { "홍길동", "임꺽정", "홍상직" };             foreach (string name in arrNames)             {                 Console.WriteLine("{0}", name);             }             Console.WriteLine();               for (int i = 0; i < arrNames.Length; i++)//위의 foreach와 같은 기능             {                 Console.WriteLine("{0}", arrNames[i]);             }             Console.WriteLine();               int j = 0;             while (true)             {                   Console.WriteLine("{0}", arrNames[j]);                 j++;                 if (j >= arrNames.Length)                 {                     break;                 }             }             Console.WriteLine();             Console.WriteLine(arrNames.GetValue(1));             Console.WriteLine(Array.IndexOf(arrNames, "임꺽정"));             //docs//array.GetValue()           }     } }   Colored by Color Scripter

cs