C# | Uri.IsHexEncoding() Method Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Uri.IsHexEncoding(String, Int32) Method is used to check whether a character in a string is hexadecimal encoded or not. This checks for hexadecimal encoding which follows the pattern "%hexhex" in a string, where "hex" is a digit from 0 to 9 or a letter from A-F (case-insensitive). Syntax: public static bool IsHexEncoding (string pattern, int index); Parameters: pattern: It is the string to check. index: It is the location in pattern to check for hexadecimal encoding. Return Value: This method returns a Boolean value that is true if pattern is hexadecimal encoded at the specified location otherwise, false. Below programs illustrate the use of Uri.IsHexEncoding(String, Int32) Method: Example 1: csharp // C# program to demonstrate the // Uri.IsHexEncoding(String, // Int32) Method using System; using System.Globalization; class GFG { // Main Method public static void Main() { // Declaring and initializing pattern string pattern = "%75"; // Declaring and initializing index int index = 1; // Validating the Character in the String // using IsHexEncoding(String, Int32) method bool value = Uri.IsHexEncoding(pattern, index); // Displaying the result if (value) Console.WriteLine("{0}({1}) is a valid "+ "Hexadecimal Encoded", pattern); else Console.WriteLine("{0} is a valid"+ " Hexadecimal Encoded", pattern); } } Output: %75 is a valid Hexadecimal Encoded Example 2: csharp // C# program to demonstrate the // Uri.IsHexEncoding(String, // Int32) Method using System; using System.Globalization; class GFG { // Main Method public static void Main() { // calling get() method get("%65", 1); get("%75", 0); get("%55", 0); } // defining get() method public static void get(string pattern, int index) { // Validating the Character in the String // using IsHexEncoding(String, Int32) method bool value = Uri.IsHexEncoding(pattern, index); // Displaying the result if (value) Console.WriteLine("{0} is a valid"+ " Hexadecimal Encoded", pattern); else Console.WriteLine("{0} is a not valid"+ " Hexadecimal Encoded", pattern); } } Output: %65 is a not valid Hexadecimal Encoded %75 is a valid Hexadecimal Encoded %55 is a valid Hexadecimal Encoded Reference: https://learn.microsoft.com/en-us/dotnet/api/system.uri.ishexencoding?view=netstandard-2.1 Comment More info R rohitprasad3 Follow Improve Article Tags : C# CSharp-method CSharp-Uri-Class Explore IntroductionC# Tutorial 4 min read Introduction to .NET Framework 6 min read C# .NET Framework (Basic Architecture and Component Stack) 6 min read C# Hello World 2 min read Common Language Runtime (CLR) in C# 4 min read FundamentalsC# Identifiers 2 min read Data Types in C# 6 min read C# Variables 4 min read C# Literals 5 min read Operators in C# 7 min read C# Keywords 5 min read Control StatementsC# Decision Making (if, if-else, if-else-if ladder, nested if, switch, nested switch) 5 min read C# Switch Statement 4 min read Loops in C# 4 min read C# Jump Statements (Break, Continue, Goto, Return and Throw) 4 min read OOP ConceptsClass and Objects in C# 4 min read Constructors in C# 5 min read C# Inheritance 3 min read Encapsulation in C# 2 min read C# Abstraction 4 min read MethodsMethods in C# 4 min read Method Overloading in C# 4 min read C# | Method Parameters 7 min read Method Overriding in C# 7 min read Anonymous Method in C# 3 min read ArraysArrays in C# 6 min read Jagged Arrays in C# 4 min read Array Class in C# 5 min read How to Sort an Array in C# | Array.Sort() Method Set - 1 8 min read How to find the rank of an array in C# 2 min read ArrayListArrayList in C# 6 min read C# ArrayList Class 7 min read C# | Array vs ArrayList 2 min read StringStrings in C# 6 min read C# Verbatim String Literal - @ 5 min read C# String Class 9 min read C# StringBuilder 4 min read C# String vs StringBuilder 3 min read TupleC# Tuple 7 min read C# Tuple Class 3 min read C# ValueTuple 7 min read C# ValueTuple Struct 4 min read IndexersC# Indexers 4 min read C# Multidimensional Indexers 5 min read C# - Overloading of Indexers 3 min read Like