Skip to content
Related Articles

Related Articles

Improve Article

C# | String.ToLowerInvariant Method

  • Last Updated : 22 Jun, 2021
Geek Week

String.ToLowerInvariant Method is used to get a copy of this String object converted to lowercase using the casing rules of the invariant culture. Here, “invariant culture” represents a culture that is culture-insensitive.

Syntax: 

public string ToLowerInvariant ();

Return value: The return type of this method is System.String. This method returns a string which is a lowercase equivalent of the current string.

Below given are some examples to understand the implementation in a better way: 

Example 1: 



C#




// C# program to illustrate
// ToLowerInvariant() method
using System;
 
class GFG {
 
    // Main method
    static public void Main()
    {
 
        // variables
        string strA = "WelCome tO GeeKSfOrGeeKs";
        string strB;
 
        // Convert strA into lowercase
        // using ToLowerInvariant() method
        strB = strA.ToLowerInvariant();
 
        // Display string before ToLowerInvariant() method
        Console.WriteLine("String before ToLowerInvariant:");
        Console.WriteLine(strA);
        Console.WriteLine();
 
        // Display string after ToLowerInvariant() method
        Console.WriteLine("String after ToLowerInvariant:");
        Console.WriteLine(strB);
    }
}
Output: 
String before ToLowerInvariant:
WelCome tO GeeKSfOrGeeKs

String after ToLowerInvariant:
welcome to geeksforgeeks

 

Example 2:

C#




// C# program to illustrate
// ToLowerInvariant() Method
using System;
 
public class GFG {
 
    // Main method
    static public void Main()
    {
        // calling function
        Convert("GEeks");
        Convert("geeks");
        Convert("GEEKS");
    }
 
    static void Convert(String value)
    {
 
        // Display  strings
        Console.WriteLine("String 1:  {0}", value);
 
        // Convert sting into Lowercase
        // using ToLowerInvariant() method
        value = value.ToLowerInvariant();
 
        // Display the Lowercase strings
        Console.WriteLine("String 2:  {0}", value);
    }
}
Output: 
String 1:  GEeks
String 2:  geeks
String 1:  geeks
String 2:  geeks
String 1:  GEEKS
String 2:  geeks

 

Note: 

  • The invariant culture represents a culture that is culture-insensitive. It is associated with the English language but not with a specific country or region.
  • ToLowerInvariant() method does not modify the value of the current instance. Instead, it returns a new string in which all characters in the current instance are converted to lowercase.
  • This method can’t be overloaded if you try to overload this method, it will give you compile-time error.

Reference: https://docs.microsoft.com/en-us/dotnet/api/system.string.tolowerinvariant?view=netframework-4.7.2
 




My Personal Notes arrow_drop_up
Recommended Articles
Page :