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# 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);
}
} |
String before ToLowerInvariant: WelCome tO GeeKSfOrGeeKs String after ToLowerInvariant: welcome to geeksforgeeks
Example 2:
// 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 string into Lowercase
// using ToLowerInvariant() method
value = value.ToLowerInvariant();
// Display the Lowercase strings
Console.WriteLine( "String 2: {0}" , value);
}
} |
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