C# | Converting an array of one type to an array of another type Last Updated : 01 Feb, 2019 Comments Improve Suggest changes Like Article Like Report Array.ConvertAll(TInput[], Converter<TInput, TOutput>) Method is used to convert an array of one type to an array of another type. Syntax: public static TOutput[] ConvertAll<TInput,TOutput> (TInput[] array, Converter<TInput,TOutput> converter); Here, TInput and TOutput is the source array and target array respectively. Parameters: array: It is the one-dimensional, zero-based Array to convert to a target type. converter: It is a Converter that converts each element from one type to another type. Return Value: This method returns an array of the target type containing the converted elements from the source array. Exception: This method throws ArgumentNullException if the array is null or converter is null. Below programs illustrate the use of Array.ConvertAll(TInput[], Converter<TInput, TOutput>) Method Example 1: CSHARP // C# program to demonstrate // Array.ConvertAll() Method using System; using System.Collections.Generic; public class GFG { // Main Method public static void Main() { try { // Creating and initializing // new the Array of int int[] myArr = {10, 20, 30, 40}; // Display the values of the myArr. Console.WriteLine("Initial Array:"); // calling the PrintIndexAndValues() // method to print PrintIndexAndValues(myArr); // converting int myArr to String conarr String[] conarr = Array.ConvertAll(myArr, new Converter<int, String>(intToString)); // Display the values of the myArr. Console.WriteLine("Converted Array:"); // calling the PrintIndexAndValues() // method to print PrintIndexAndValues(conarr); } catch (ArgumentNullException e) { Console.Write("Exception Thrown: "); Console.Write("{0}", e.GetType(), e.Message); } } // Defining the method // PrintIndexAndValues public static void PrintIndexAndValues(String[] myArr) { for (int i = 0; i < myArr.Length; i++) { Console.WriteLine("{0}", myArr[i]); } Console.WriteLine(); } // Defining the method // PrintIndexAndValues public static void PrintIndexAndValues(int[] myArr) { for (int i = 0; i < myArr.Length; i++) { Console.WriteLine("{0}", myArr[i]); } Console.WriteLine(); } // Defining the method // intToString public static String intToString(int pf) { return pf.ToString(); } } Output: Initial Array: 10 20 30 40 Converted Array: 10 20 30 40 Example 2: CSHARP // C# program to demonstrate // Array.ConvertAll() Method using System; using System.Collections.Generic; public class GFG { // Main Method public static void Main() { try { // Creating and initializing new // the Array of int with null value int[] myArr = null; // converting int myArr to String conarr String[] conarr = Array.ConvertAll(myArr, new Converter<int, String>(intToString)); // calling the PrintIndexAndValues() // method to print PrintIndexAndValues(conarr); } catch (ArgumentNullException e) { Console.Write("Exception Thrown: "); Console.Write("{0}", e.GetType(), e.Message); } } // Defining the method // PrintIndexAndValues public static void PrintIndexAndValues(String[] myArr) { for (int i = 0; i < myArr.Length; i++) { Console.WriteLine("{0}", myArr[i]); } Console.WriteLine(); } // Defining the method // intToString public static String intToString(int pf) { return pf.ToString(); } } Output: Exception Thrown: System.ArgumentNullException Reference: https://docs.microsoft.com/en-us/dotnet/api/system.array.convertall?view=netframework-4.7.2 Comment More infoAdvertise with us Next Article C# | Converting an array of one type to an array of another type rohitprasad3 Follow Improve Article Tags : C# CSharp-method CSharp-Arrays Similar Reads C# | How to convert an ArrayList to Array In C#, an array is a group of like-typed variables that are referred to by a common name. 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