how to delete multiple items from a list box and removing it from dataset datatable IN "WINDOWS APPLICATION"

Use "SelectedItems" properties of ListBox. Do for every item of this collection the same what you do for single selected item

But remember to loop through the list of selected items backwards if you're going to remove them, otherwise you will find yourself getting "Index Out Of Range" exceptions.

foreach (ListItem i in ListBox1.Items)
        {
            if (i.Selected)
            {
               //delete i.Value from data
            }
        }

public void RemoveItems()
        {
         
           string temp = listBox1.SelectedItem.ToString();
            for(int i =incidentTypeDataSet.IncidentTypeAlias.Rows.Count  ;i>0  ;i-- )
            {
                if (incidentTypeDataSet.IncidentTypeAlias[i].AliasId == temp)
                {
                    parentManager.ProcessAction("AliasRemove");
                    incidentTypeDataSet.IncidentTypeAlias.Rows.RemoveAt(i);
                    listBox1.Items.RemoveAt(i);
                    //break;
                }
            }
         
                                }

hi  carl_tawn: s ia mgettingthis exception how to do that can u please help me thanks

When you are deleting items, do not use "foreach", use "for" operator. this will prevent you from
using index which is bigger than number of items
for ( int i = listBox1.Items.Count-1; i > -1;i-- )
{
.......
}
Paste your code, so we can help you to correct it

//check this is a reverse loop, so you won't get exception.
for ( int i = listBox1.Items.Count-1; i > -1;i-- )
{
    if(listBox1.Items[i].Selected)
        listBox1.Items.RemoveAt(i);
}

here is the code ca nu tell em how to remove or loop thorugh  the dataset datatabel and remove the selected items
for (int i = 0; i < listBox1.SelectedItems.Count; i++)
              {
                  IncidentTypeDataSet.IncidentTypeAliasRow rowTemp = (IncidentTypeDataSet.IncidentTypeAliasRow)incidentTypeDataSet.IncidentTypeAlias.NewRow();

                  // Copy the keys from IncidentType table to IncidentTypeAlias table...
                  rowTemp.AgencyId = incidentTypeDataSet.IncidentType[0].AgencyId;
                  rowTemp.IncidentTypeId = incidentTypeDataSet.IncidentType[0].IncidentTypeId;
                  rowTemp.RecordTypeCode = incidentTypeDataSet.IncidentType[0].RecordTypeCode;
                  rowTemp.AliasId = listBox1.SelectedItems[i].ToString();
                  incidentTypeDataSet.IncidentTypeAlias.Rows.Add(rowTemp);          
              parentManager.ProcessAction("AliasRemove");                          
                  for (int i = 0; i < listBox1.SelectedItems.Count; i++)
                      listBox1.Items.Remove(listBox1.SelectedItems[i]);
}