title: how to open new window in new tab with dynamic url
body: <p>i have a page with drop down list and i have to open a new window with selected iteam's edit form</p>
  
  <pre><code>protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
  {
      this.EntityGrid.Columns.Clear();
      EntityName.Text = DropDownList1.SelectedItem.Text;
      newEntity.Visible = true;
      newEntity.Text = DropDownList1.SelectedItem.Text;
      ...
  }
  </code></pre>
  
  <p>the following works</p>
  
  <pre><code>protected void newEntity_Click(object sender, EventArgs e)
  {
      var entity = newEntity.Text;
      Response.Redirect(entity + "Edit.aspx");
      ...
  }
  </code></pre>
  
  <p>but how can i open in separate tab not new window.</p>