Distinct linq not used, C#

Distinct linq not used

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Write a program to filter distinct items from the array
            //array = [1,4,2,5,4,2,5,1,6,2,5,3,8,9,6]
            //Builtin array functions and LINQ are not allowed.
            
            int []array = {1,4,2,5,4,2,5,1,6,2,5,3,8,9,6};
            
             for(int i = 0 ; i < array.Length ;i++ )
             {
                 int j;
                 
                 for(j =0 ; j<i ; j++)
                 {
                     if(array[i]==array[j])
                     {
                         break;
                     }
                     
                 }
                  
                 if(i==j)
                 {
                     Console.WriteLine(array[i]);
                 }
             }
            
            
            
        }
    }
}


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