C# | Char.ToUpperInvariant(Char) Method Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report This method is used to converts the value of a Unicode character to its uppercase equivalent using the casing rules of the invariant culture. Syntax: public static char ToUpperInvariant (char c); Here, c is the Unicode character to convert. Return Value: This method returns the uppercase equivalent of the c parameter, or the unchanged value of c, if c is already uppercase or not alphabetic. Below programs illustrate the use of Char.ToUpperInvariant(Char) Method: Example 1: csharp // C# program to demonstrate // Char.ToUpperInvariant() // Method using System; class GFG { // Main Method public static void Main() { // calling get() Method get('A'); get('a'); get('B'); get('b'); get('-'); } // Defining get() method public static void get(char c) { // getting Unicode character // using ToUpperInvariant() Method char val = Char.ToUpperInvariant(c); // display the char value Console.WriteLine("The uppercase equivalent"+ " of the {0} is {1}", c, val); } } Output: The uppercase equivalent of the A is A The uppercase equivalent of the a is A The uppercase equivalent of the B is B The uppercase equivalent of the b is B The uppercase equivalent of the - is - Example 2: csharp // C# program to demonstrate // Char.ToUpperInvariant() // Method using System; class GFG { // Main Method public static void Main() { // declaring and initializing char variable char c = 'a'; // getting Unicode character // using ToUpperInvariant() Method char val = Char.ToUpperInvariant(c); // display the char value Console.WriteLine("The Uppercase equivalent"+ " of the {0} is {1}", c, val); } } Output: The Uppercase equivalent of the a is A Reference: https://learn.microsoft.com/en-us/dotnet/api/system.char.toupperinvariant?view=netframework-4.7.2 Comment More infoAdvertise with us R rohitprasad3 Follow Improve Article Tags : C# CSharp-method CSharp-Char-Struct 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 4 min read Common Language Runtime (CLR) in C# 4 min read FundamentalsC# Identifiers 2 min read C# Data Types 7 min read C# Variables 4 min read C# Literals 5 min read C# Operators 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 C# Loops 4 min read C# Jump Statements (Break, Continue, Goto, Return and Throw) 4 min read OOP ConceptsC# Class and Objects 5 min read C# Constructors 5 min read C# Inheritance 6 min read C# Encapsulation 4 min read C# Abstraction 4 min read MethodsC# Methods 4 min read C# Method Overloading 4 min read C# | Method Parameters 7 min read C# Method Overriding 9 min read Anonymous Method in C# 3 min read ArraysC# Arrays 8 min read C# Jagged Arrays 4 min read C# Array Class 7 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 StringC# Strings 7 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