{
            openFileDialog1.Filter = "Audio & Video Files (*,AVI;* IFV;* DIV;* DIVX;* WMV;* ASF;*ASX;* MPG;* MPEG;* MPE;* M4V;* MP4;* MVV;* M2V;* M1V;* MOD;* QT;* MOV;* DV;*DAT;* 3GP;* 3G2;* 3GPP;* 3GP2;* MS;*DVR;* DVR;*MS;* GVI;* OGM;* OGG;* OGV;* MKV;* FLV;* F4V;* F4P;* TS;* TP;*TRP;* M2TS;* M2T;* MTS;* AMV;* MTV;* CDG;* NSV;* FLI;* FLC;* RM;* RAM;* RMVB;* RV;*IVR;* WAV;* MP3;* MPEG3;* CDA;* MP2;* M4A;* WMA;* OGG;* AAC;* MPC;* MPP;* MP+;*AIF, AIFF;* AIFC;* AU;*SND;* AMR;* AWB;* FLAC;* AC3;* PCX;* RAS;* TGA;* WMF;* EMF;*MPEG;*VOB;* AVI;* Ogg;*OGM;* VIVO;*ASF;*WMA;*WMV;* QT;*MOV;*MP4;* RealMedia;* Matroska;* NUT;* NuppelVideo;*FLI;* YUV;*4MPEG;* FILM;*RoQ;*PVA files;* XAnim;* DLL codecs;*VideoCD, SVCD;* DVD;* 3ivx ;* DivX 3/4/5;*WMV ;* H.264 movies)|*,AVI;* IFV;* DIV;* DIVX;* WMV;* ASF;*ASX;* MPG;* MPEG;* MPE;* M4V;* MP4;* MVV;* M2V;* M1V;* MOD;* QT;* MOV;* DV;*DAT;* 3GP;* 3G2;* 3GPP;* 3GP2;* MS;*DVR;* DVR;*MS;* GVI;* OGM;* OGG;* OGV;* MKV;* FLV;* F4V;* F4P;* TS;* TP;*TRP;* M2TS;* M2T;* MTS;* AMV;* MTV;* CDG;* NSV;* FLI;* FLC;* RM;* RAM;* RMVB;* RV;*IVR;* WAV;* MP3;* MPEG3;* CDA;* MP2;* M4A;* WMA;* OGG;* AAC;* MPC;* MPP;* MP+;*AIF, AIFF;* AIFC;* AU;*SND;* AMR;* AWB;* FLAC;* AC3;* PCX;* RAS;* TGA;* WMF;* EMF;*MPEG;*VOB;* AVI;* Ogg;*OGM;* VIVO;*ASF;*WMA;*WMV;* QT;*MOV;*MP4;* RealMedia;* Matroska;* NUT;* NuppelVideo;*FLI;* YUV;*4MPEG;* FILM;*RoQ;*PVA files;* XAnim;* DLL codecs;*VideoCD, SVCD;* DVD;* 3ivx ;* DivX 3/4/5;*WMV ;* H.264 movies")|*,AVI;* IFV;* DIV;* DIVX;* WMV;* ASF;*ASX;* MPG;* MPEG;* MPE;* M4V;* MP4;* MVV;* M2V;* M1V;* MOD;* QT;* MOV;* DV;*DAT;* 3GP;* 3G2;* 3GPP;* 3GP2;* MS;*DVR;* DVR;*MS;* GVI;* OGM;* OGG;* OGV;* MKV;* FLV;* F4V;* F4P;* TS;* TP;*TRP;* M2TS;* M2T;* MTS;* AMV;* MTV;* CDG;* NSV;* FLI;* FLC;* RM;* RAM;* RMVB;* RV;*IVR;* WAV;* MP3;* MPEG3;* CDA;* MP2;* M4A;* WMA;* OGG;* AAC;* MPC;* MPP;* MP+;*AIF, AIFF;* AIFC;* AU;*SND;* AMR;* AWB;* FLAC;* AC3;* PCX;* RAS;* TGA;* WMF;* EMF;*MPEG;*VOB;* AVI;* Ogg;*OGM;* VIVO;*ASF;*WMA;*WMV;* QT;*MOV;*MP4;* RealMedia;* Matroska;* NUT;* NuppelVideo;*FLI;* YUV;*4MPEG;* FILM;*RoQ;*PVA files;* XAnim;* DLL codecs;*VideoCD, SVCD;* DVD;* 3ivx ;* DivX 3/4/5;*WMV ;* H.264 movies)|*,AVI;* IFV;* DIV;* DIVX;* WMV;* ASF;*ASX;* MPG;* MPEG;* MPE;* M4V;* MP4;* MVV;* M2V;* M1V;* MOD;* QT;* MOV;* DV;*DAT;* 3GP;* 3G2;* 3GPP;* 3GP2;* MS;*DVR;* DVR;*MS;* GVI;* OGM;* OGG;* OGV;* MKV;* FLV;* F4V;* F4P;* TS;* TP;*TRP;* M2TS;* M2T;* MTS;* AMV;* MTV;* CDG;* NSV;* FLI;* FLC;* RM;* RAM;* RMVB;* RV;*IVR;* WAV;* MP3;* MPEG3;* CDA;* MP2;* M4A;* WMA;* OGG;* AAC;* MPC;* MPP;* MP+;*AIF, AIFF;* AIFC;* AU;*SND;* AMR;* AWB;* FLAC;* AC3;* PCX;* RAS;* TGA;* WMF;* EMF;*MPEG;*VOB;* AVI;* Ogg;*OGM;* VIVO;*ASF;*WMA;*WMV;* QT;*MOV;*MP4;* RealMedia;* Matroska;* NUT;* NuppelVideo;*FLI;* YUV;*4MPEG;* FILM;*RoQ;*PVA files;* XAnim;* DLL codecs;*VideoCD, SVCD;* DVD;* 3ivx ;* DivX 3/4/5;*WMV ;* H.264 movies";


            openFileDialog1.InitialDirectory = "C:\\";
           openFileDialog1.Title = "فتح ملف";
          if (openFileDialog1.ShowDialog() == DialogResult.OK)

واليكم صورة تدل على الاخطأ
   

فأرجوا المساعدة

 openFileDialog1.Filter

openFileDialog1.Filter ="Audio (*.mp3,*.acc,*wma)|*.acc;*.mp3;*.wma|All Files (*.*)|*.*"

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using Microsoft.DirectX;
using Microsoft.DirectX.AudioVideoPlayback;

namespace sham_player
 
{
    public partial class Form1 : Form
        
    {
        private Audio ap;
        private Video vp;
        private AxRealAudioObjects.AxRealAudio rp=new AxRealAudioObjects.AxRealAudio();
        private string type;
        public List<string> albume = new List<string>();
       
        public Form1()
        {
            InitializeComponent();
        }

        private void menuStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void فتحملفToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "Audio & Video Files (*.avi,*.ifv,*.div,*.Audio,*. divx,*.wmv,*.asf,*.asx,*.mpg,*.mpeg,*.mpe,*.m4v,*.mp4,*.mvv,*.m2v,*.miv,*.mod,*.qt,*.mov,*.dv,*.dat,*.3gp,*.3g2,*.3gpp,*.3gp2,*.ms,*.dvr,*.gvi,*.ogm,*.ogg,*.ogv,*.m2t,*.mts,*.mkv,*.flv,*.fli,*.f4v,*.f4p,*.ts,*.tp,*.trp,*.m2ts,*.flc,*.amv,*.mtv,*.cdg,*.nsv,*.rm,*.ram,*.ramvb,*.rv,*.ivr,*.wav,*.mp2,*.mp3,*.mpeg3,*.cda,*.m4a,*.wma,*.aac,*.mpc,*.mpp,*.mp+,*.aif,*.aiff,*.aifc,*.au,*.snd,*.amr,*.awb,*.flac,*.ac3,*.pcx,*.ras,*.tga,*.wmf,*.emf,*.mpeg,*.vob,*.ogm,*.vivo,*.asf,*.mp4,*.mx,*.xm,*.realmedia,*.matroska,*.nuppelvideo,*.yuv,*.4mpeg,*.flim,*.roq,*.pvafiles,*.xanim,*.dllcodces,*.videocd,*.svcd,*.dvd,*.3ivx,*.divx3/4/5,*h.264movies*)|*.avi;*.ifv;*.div;*.divx;*.wmv;*.asf;*.asx;*.mpg;*.mpeg;*.mpe;*.m4v;*.mp4;*.mvv;*.m2v;*.miv;*.mod;*.qt;*.mov;*.dv;*.dat;*.3gp;*.3g2;*.3gpp;*.3gp2;*.ms;;*.dvr;*.gvi;*.ogm;*.ogg;*.ogv;*.m2t;*.mts;*.mkv;*.flv;*.fli;*.f4v;*.f4p;*.ts;*.tp;*.trp;*.m2ts;*.flc;*.amv;*.mtv;*.cdg;*.nsv;*.rm;*.ram;*.ramvb;*.rv;*.ivr;*.wav;*.mp2;*.mp3;*.mpeg3;*.cda;*.m4a;*.wma;*.aac;*.mpc;*.mpp;*.mp+;*.aif;*.aiff;*.aifc;*.au;*.snd;*.amr;*.awb;*.flac;*.ac3;*.pcx;*.ras;*.tga;*.wmf;*.emf;*.mpeg;*.vob;*.ogm;*.vivo;*.asf;*.mp4;*.mx;*.xm;*.realmedia;*.matroska;*.nuppelvideo;*.yuv;*.4mpeg;*.flim;*.roq;*.pvafiles;*.xanim;*.dllcodces;*.videocd;*.svcd;*.dvd;*.3ivx;*.divx3/4/5*h.264movies*";




            openFileDialog1.InitialDirectory = "C:\\";
           openFileDialog1.Title = "فتح ملف";
          if (openFileDialog1.ShowDialog() == DialogResult.OK)
             {
              
             }

        }

        private void فتحسواقةToolStripMenuItem_Click(object sender, EventArgs e)
        {
        
        }

        private void ملفToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void تعليماتToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void trackBar1_Scroll(object sender, EventArgs e)
        {

        }

        private void pictureBox6_Click(object sender, EventArgs e)
        {

        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }

        private void pictureBox3_Click(object sender, EventArgs e)
        {

        }

        private void pictureBox2_Click(object sender, EventArgs e)
        {

        }

        private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
        {

        }

        private void تحريرToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {

        }
    }
}

https://www.youtube.com/watch?v=K7l1OGHNfeE