C#

int GetIndexOfRow(DataSet dataSet, DataRow row)
{
   foreach(DataTable table in dataSet.Tables)
   {
       int index = table.Rows.IndexOf(row);
       if(index != -1)
       {
          return index;
       }
   }

   return -1;
}

bool isA = false;
bool isB = false;
foreach (chromosome c in theCell)
  foreach (gene g in c)
  {
    if (g == KnownGenes.BloodTypes.A)
      isA = true;
    if (g == KnownGenes.BloodTypes.B)
      isB = true;
  }

if (isA && isB)
   printf("type AB");
else if (isA)
   printf("type A");
else if ( isB)
   printf("type B");
else    printf("type O");

Harta hr = this.ParentForm as Harta;<br />
if (hr != null) hr.OnPaint1();

public class MainForm : Form<br />
{<br />
       public void CreateChild()<br />
        {<br />
                ChildForm cForm = new ChildForm();<br />
                cForm.ParentForm = this;<br />
                cForm.MyOnPaint += new EventHandler(OnPaint1);<br />
<br />
                cForm.Show();    <br />
        }<br />
<br />
        protected override void OnPaint1(object sender, EventArgs e)<br />
        {<br />
        }<br />
}<br />
<br />
public class ChildForm : Form<br />
{<br />
        public event EventHandler MyEvent;<br />
<br />
        protected override void OnMyEvent(object sender, EventArgs e)<br />
        {<br />
                if (MyEvent != null)<br />
                        MyEvent(sender, e);<br />
        }<br />
}

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int currentIndex = CurrentTreeNode.Parent.Nodes.IndexOf(CurrentTreeNode);
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// to insert before
CurrentTreeNode.Parent.Nodes.Insert(NewNode,currentIndex);
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// to insert after
CurrentTreeNode.Parent.Nodes.Insert(NewNode,currentIndex+1);
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