MediaPlayer.txt

 //permission need
 	<uses-permission android:name="android.permission.INTERNET" />
	<uses-permission android:name="android.permission.RECORD_AUDIO" />

	//layout degin
	<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <SeekBar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/seekBar1" />
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/linearLayout1">
        <Button
            android:id="@+id/bustart"
            android:text="Start"
            android:layout_width="wrap_content"
            android:layout_height="match_parent" />
        <Button
            android:text="Stop"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:id="@+id/buStop" />
        <Button
            android:text="Pause"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:id="@+id/buPause" />
    </LinearLayout>
</LinearLayout>

//code need
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Android.Media;

namespace Android_Media
{
    [Activity(Label = "Android_Media", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        //define timer
        System.Timers.Timer t;
//define seek bar
        SeekBar seekBar1;
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);
            //set timer 
           
            t = new System.Timers.Timer();
            t.Interval = 3000;
            t.Elapsed += new System.Timers.ElapsedEventHandler(t_Elapsed);
            seekBar1 = FindViewById<SeekBar>(Resource.Id.seekBar1);

            //prepar audio
            string filePath = "http://server6.mp3quran.net/thubti/001.mp3";
            PreparePlayer(filePath);

            //start
            Button button = FindViewById<Button>(Resource.Id.bustart);
            button.Click += delegate {
                player.Start();
                t.Start();
            };
            //stop
            Button buStop = FindViewById<Button>(Resource.Id.buStop);
            buStop.Click += delegate {
                 player.Stop();
                t.Stop();
              PreparePlayer(filePath);
            };
            //pause
            Button buPause = FindViewById<Button>(Resource.Id.buPause);
            buPause.Click += delegate {
                 player.Pause();
                t.Stop();
            };



        }



        protected MediaPlayer player;
        public void PreparePlayer(String filePath)
        {
            if (player == null)
            {
                player = new MediaPlayer();
            }
            player.Reset();
            player.SetDataSource(filePath);
            player.Prepare();
            seekBar1.Max = player.Duration;


        }

        protected void t_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            seekBar1.Progress =player.CurrentPosition ;
        }
    }
}