using System;

​

​

public class Program

{

    public static void Main()

    {

        String frase = " hola hola jaime hola hola jaime";

        String [] f = frase.Split(' ');

        String final="";

        Array.Sort(f);

        for(int i = 0;i<f.Length;i++){

        for(int z = i+1;z<f.Length;z++){

         if(f[i].Equals(f[z])){

        f[z]="";

        }

        }

        }

        for(int i = 0;i<f.Length;i++){

        Console.Write(f[i]+" ");    

        }

    }

    }

​