C# | ToCharArray() Method Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report In C#, ToCharArray() is a string method. This method is used to copy the characters from a specified string in the current instance to a Unicode character array or the characters of a specified substring in the current instance to a Unicode character array. This method can be overloaded by changing the number of arguments passed to it. Syntax: public char[] ToCharArray() or public char[] ToCharArray(int startIndex, int length) Explanation: public char[] ToCharArray() method will take no parameter. This method will return character array. Character array elements will contain the individual characters of the string. So basically this method will copy each character of a string to the character array. The first character of the string will be copied at index zero of the character array and the last character will be copied at index Array.Length – 1. When we create a string from the characters in a character array, then it will call String(Char[]) constructor. public char[] ToCharArray(int startIndex, int length) method will take two parameters startIndex which is used to specify the starting position of the substring and its type is System.Int32. Another parameter is length which is used to specify the length of the substring and its type is System.Int32. The startIndex parameter is zero-based, means the index of the first character in the string instance can be zero. Important Points: public char[] ToCharArray(int startIndex, int length) method can give the exception ArgumentOutOfRangeException if startIndex or length is less than zero or (startIndex + length) is greater than the length of current string instance. If the specified length is zero then the returned array will be empty and will have zero length. If current or this instance is null or an empty string ("") then the returned array will be empty will have length zero. Below are the programs to demonstrate the above Methods : Program 1: To illustrate the ToCharArray() Method : csharp // C# program to demonstrate // ToCharArray() method using System; class Geeks { // Main Method public static void Main() { String str = "GeeksForGeeks"; // copy the string str to chars // character array & it will start // copy from 'G' to 's', i.e. // beginning to ending of string char[] chars = str.ToCharArray(); Console.WriteLine("String: " + str); Console.Write("Character array :"); // to display the resulted character array for (int i = 0; i < chars.Length; i++) Console.Write(" " + chars[i]); } } Output: String: GeeksForGeeks Character array : G e e k s F o r G e e k s Program 2:To illustrate the ToCharArray(int startIndex, int length) Method : csharp // C# program to demonstrate // ToCharArray(int startIndex, int length) // method using System; class Geeks { // Main Method public static void Main() { String str = "GeeksForGeeks"; // copy the string str to chars // character array & it will // start copy from 'F' to 'r' i.e. // copy from startindex of string // is 5 upto (startindex+length-1) i.e. // 5 + (3-1) has to copy char[] chars1 = str.ToCharArray(5, 3); Console.WriteLine("String: " + str); Console.WriteLine("\nCharacter array 1:"); // to display the resulted character array for (int i = 0; i < chars1.Length; i++) Console.WriteLine("Index " + i + " : " + chars1[i]); // copy the string str to chars // character array & it will // start copy from 'F' to 'k' i.e. // copy from startindex of string // 5 upto (startindex+length-1) i.e. // 5 + (7-1) char[] chars2 = str.ToCharArray(5, 7); Console.Write("\nCharacter array 2:"); // to display the resulted character // array using foreach loop foreach(char c in chars2) Console.Write(" " + c); } } Output: String: GeeksForGeeks Character array 1: Index 0 : F Index 1 : o Index 2 : r Character array 2: F o r G e e k References : https://learn.microsoft.com/en-us/ https://learn.microsoft.com/en-us/ Comment More infoAdvertise with us Next Article Company Preparation M Mithun Kumar Follow Improve Article Tags : Misc C# CSharp-method CSharp-string Practice Tags : Misc Similar Reads Interview PreparationInterview Preparation For Software DevelopersMust Coding Questions - Company-wise Must Do Coding Questions - Topic-wiseCompany-wise Practice ProblemsCompany PreparationCompetitive ProgrammingSoftware Design-PatternsCompany-wise Interview ExperienceExperienced - Interview ExperiencesInternship - Interview ExperiencesPractice @GeeksforgeeksProblem of the DayTopic-wise PracticeDifficulty Level - SchoolDifficulty Level - BasicDifficulty Level - EasyDifficulty Level - MediumDifficulty Level - HardLeaderboard !!Explore More...Data StructuresArraysLinked ListStackQueueBinary TreeBinary Search TreeHeapHashingGraphAdvance Data StructuresMatrixStringAll Data StructuresAlgorithmsAnalysis of AlgorithmsSearching AlgorithmsSorting AlgorithmsPattern SearchingGeometric AlgorithmsMathematical AlgorithmsRandomized AlgorithmsGreedy AlgorithmsDynamic ProgrammingDivide & ConquerBacktrackingBranch & BoundAll AlgorithmsProgramming LanguagesCC++JavaPythonC#Go LangSQLPHPScalaPerlKotlinWeb TechnologiesHTMLCSSJavaScriptBootstrapTailwind CSSAngularJSReactJSjQueryNodeJSPHPWeb DesignWeb BrowserFile FormatsComputer Science SubjectsOperating SystemsDBMSComputer NetworkComputer Organization & ArchitectureTOCCompiler DesignDigital Elec. & Logic DesignSoftware EngineeringEngineering MathematicsData Science & MLComplete Data Science CourseData Science TutorialMachine Learning TutorialDeep Learning TutorialNLP TutorialMachine Learning ProjectsData Analysis TutorialTutorial LibraryPython TutorialDjango TutorialPandas TutorialKivy TutorialTkinter TutorialOpenCV TutorialSelenium TutorialGATE CSGATE CS NotesGate CornerPrevious Year GATE PapersLast Minute Notes (LMNs)Important Topic For GATE CSGATE CoursePrevious Year Paper: CS exams Like