arrays - Matching Game, Making the photos match in C# -

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i have been making card matching game in c#. has 12 card set (2 of each photo 6 photos in total) using picture array, , when press cards finds out if photos match using array (a int array numbers 1-6 repeated twice, same photos) use code randomize numbers 

            image away;             int tagger;             (int = 1; < 13; i++)             {                 cards[i].visible = true;                 away = pics[i];                 tagger = tags[i];                  int h = random.next(1, 6);                 pics[i] = pics[h];                 tags[i] = tags[h];                 pics[h] = away;                 tags[h] = tagger;             }             (int = 1; < 13; i++)             {                 cards[i].image = pics[i];             }

it works 4 of matches, says matches wrong rest... can help?

here rest of code:

using system; using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.threading.tasks; using system.windows.forms; using system.threading;  namespace windowsformsapplication2 {     public partial class form1 : form     {          int = 0;          picturebox card = null;          image[] pics = new image[13];          int[] tags = new int[13];     picturebox[] cards = new picturebox[13];     random random = new random();     public form1()     {         initializecomponent();         pics[1] = image.fromfile(@"h:\profile\desktop\game\photos\g1.jpg");         pics[2] = image.fromfile(@"h:\profile\desktop\game\photos\g1.jpg");         pics[3] = image.fromfile(@"h:\profile\desktop\game\photos\g2.jpg");         pics[4] = image.fromfile(@"h:\profile\desktop\game\photos\g2.jpg");         pics[5] = image.fromfile(@"h:\profile\desktop\game\photos\g3.jpg");         pics[6] = image.fromfile(@"h:\profile\desktop\game\photos\g3.jpg");         pics[7] = image.fromfile(@"h:\profile\desktop\game\photos\g4.jpg");         pics[8] = image.fromfile(@"h:\profile\desktop\game\photos\g4.jpg");         pics[9] = image.fromfile(@"h:\profile\desktop\game\photos\g5.jpg");         pics[10] = image.fromfile(@"h:\profile\desktop\game\photos\g5.jpg");         pics[11] = image.fromfile(@"h:\profile\desktop\game\photos\g6.jpg");         pics[12] = image.fromfile(@"h:\profile\desktop\game\photos\g6.jpg");         tags[1] = 1;         tags[2] = 1;         tags[3] = 2;         tags[4] = 2;         tags[5] = 3;         tags[6] = 3;         tags[7] = 4;         tags[8] = 4;         tags[9] = 5;         tags[10] = 5;         tags[11] = 6;         tags[12] = 6;          cards[1] = picturebox1;         cards[2] = picturebox2;         cards[3] = picturebox3;         cards[4] = picturebox4;         cards[5] = picturebox8;         cards[6] = picturebox7;         cards[7] = picturebox6;         cards[8] = picturebox5;         cards[9] = picturebox9;         cards[10] = picturebox10;         cards[11] = picturebox11;         cards[12] = picturebox12;     }      private void click_card(object sender, eventargs e)     {         picturebox pic = sender picturebox;         string s = pic.name;         string s1 = s.substring(10);         int num = int.parse(s1);         if (card == null)         {             card = pic;             = num;         }         else if (a > 0)         {             int 1 = tags[a];             int 2 = tags[num];             if (one == two)             {                 system.windows.forms.messagebox.show("correct!");                 = 0;                 pic.visible = false;                 card.visible = false;                 card = null;             }             else if (one != two)             {                 system.windows.forms.messagebox.show("wrong!");                 card = null;                 = 0;             }         }      }      private void button1_click(object sender, eventargs e)     {             image away;             int tagger;             (int = 1; < 13; i++)             {                 cards[i].visible = true;                 away = pics[i];                 tagger = tags[i];                  int h = random.next(1, 6);                 pics[i] = pics[h];                 tags[i] = tags[h];                 pics[h] = away;                 tags[h] = tagger;             }             (int = 1; < 13; i++)             {                 cards[i].image = pics[i];             }         }     } }

to comment on "shuffler".

if cards array, loop should start @ 0. arrays 0 based. have 12 cards, you'll 0 - 11 indexes. should use length property of array control loop.

when use random.next(1, 6), you're generating random number 1 - 5. indexes 0 & 6 - 11, never being generated, never being shuffled.

lastly, don't see why need loop, add assigning of image bottom of loop after swapping.

image away; int tagger; (int = 1; < cards.length; i++) {     cards[i].visible = true;     away = pics[i];     tagger = tags[i];      int h = random.next(1, cards.length + 1);     pics[i] = pics[h];     tags[i] = tags[h];     pics[h] = away;     tags[h] = tagger;      cards[i].image = pics[i]; }

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