If you need to convert string to char array in .Net C# you can use the built-in function in the string library called ToCharArray.
See below code example in C#.
string letters = "abcdefghijklmnopqrstuvwxyz"; char[] charLetters = letters.ToCharArray();
You can see the sample result in Windows console below. We converted into char array and printout one by one.
using System; using System.Collections.Generic; namespace ConsoleApp { class Program { public static void Main(string[] args) { string letters = "abcdefghijklmnopqrstuvwxyz"; char[] charLetters = letters.ToCharArray(); for(var i = 0; i < charLetters.Length; i++) { Console.WriteLine(string.Format("Array Index: {0} is {1}", i, charLetters[i])); } Console.Read(); } } }