C# Extension Method, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Text;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            
            var message="ajin ae";
            //Your code goes here
            Console.WriteLine("The Result of the message is "+ message.ConvertToPascalCase());
        }        
        
    }
    
    public static class StringExtension
    {
        public static string ConvertToPascalCase(this string message)
        {
            string[] splittedProduct= message.Split(' ');
            var sb = new StringBuilder();
            char[] splittedProductChars;
            foreach(var s in splittedProduct)
            {
                splittedProductChars= s.ToCharArray();
                if(splittedProductChars[0] > 0)
                {
                    splittedProductChars[0]=((new String(splittedProductChars[0],1)).ToUpper().ToCharArray())[0];
                }
                sb.Append(new String(splittedProductChars));
                sb.Append(" ");
            }            
            return sb.ToString().TrimEnd();            
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,16 sec, absolute running time: 0,11 sec, cpu time: 0,11 sec, average memory usage: 14 Mb, average nr of threads: 3, absolute service time: 0,31 sec