case 1: pictureBox1.BackgroundImage = Properties.Resources.card11; break;
case 2: pictureBox1.BackgroundImage = Properties.Resources.card12; break;
case 3: pictureBox1.BackgroundImage = Properties.Resources.card13; break;
case 4: pictureBox1.BackgroundImage = Properties.Resources.card14; break;
case 5: pictureBox1.BackgroundImage = Properties.Resources.card15; break;
case 6: pictureBox1.BackgroundImage = Properties.Resources.card16; break;
case 7: pictureBox1.BackgroundImage = Properties.Resources.card17; break;
case 8: pictureBox1.BackgroundImage = Properties.Resources.card18; break;
case 9: pictureBox1.BackgroundImage = Properties.Resources.card19; break;
case 10: pictureBox1.BackgroundImage = Properties.Resources.card21; break;
case 11: pictureBox1.BackgroundImage = Properties.Resources.card22; break;
case 12: pictureBox1.BackgroundImage = Properties.Resources.card23; break;
case 13: pictureBox1.BackgroundImage = Properties.Resources.card24; break;
case 14: pictureBox1.BackgroundImage = Properties.Resources.card25; break;
case 15: pictureBox1.BackgroundImage = Properties.Resources.card26; break;
case 16: pictureBox1.BackgroundImage = Properties.Resources.card27; break;
case 17: pictureBox1.BackgroundImage = Properties.Resources.card28; break;
case 18: pictureBox1.BackgroundImage = Properties.Resources.card29; break;
case 19: pictureBox1.BackgroundImage = Properties.Resources.card31; break;
case 20: pictureBox1.BackgroundImage = Properties.Resources.card32; break;
case 21: pictureBox1.BackgroundImage = Properties.Resources.card33; break;
case 22: pictureBox1.BackgroundImage = Properties.Resources.card34; break;
case 23: pictureBox1.BackgroundImage = Properties.Resources.card35; break;
case 24: pictureBox1.BackgroundImage = Properties.Resources.card36; break;
case 25: pictureBox1.BackgroundImage = Properties.Resources.card37; break;
case 26: pictureBox1.BackgroundImage = Properties.Resources.card38; break;
case 27: pictureBox1.BackgroundImage = Properties.Resources.card39; break;
case 28: pictureBox1.BackgroundImage = Properties.Resources.card41; break;
case 29: pictureBox1.BackgroundImage = Properties.Resources.card42; break;
case 30: pictureBox1.BackgroundImage = Properties.Resources.card43; break;
Вот вроде вшил но просят чтобы без case это возможно?