Question

How to compare case insensitive string in C#

Answer 1

using System;
 
class CompareCaseInsensitiveString_CSharp
{
    static void Main(string[] args)
    {
        string s1 = "c# JAVA", s2 = "C# java";

        if (s1.IndexOf(s2, StringComparison.OrdinalIgnoreCase) >= 0)
            Console.WriteLine("Equal");
        else
            Console.WriteLine("Not Equal");
    }
}


 
/*
run:
    
Equal
       
*/

 

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Answer 2

using System;
using System.Text.RegularExpressions;

class CompareCaseInsensitiveString_CSharp
{
    static void Main(string[] args)
    {
        string s1 = "c# JAVA", s2 = "C# java";

        bool b = Regex.IsMatch(s2, s1, RegexOptions.IgnoreCase);
 
        if (b) {
            Console.WriteLine("Equal");
        }
        else {
            Console.WriteLine("Not Equal");
        }
    }
}


 
/*
run:
    
Equal
       
*/

 

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