e">TThird</span>.</td>
</tr>
<tr>
<td class="IconColumn">
<img src="../../GFX/PublicClass.gif" alt="Public Class" />&nbsp;<img src="../../GFX/Abstract.gif" alt="Abstract" /></td>
<td><a href="../../Contents/1/221.html">Either&lt;TFirst, TSecond&gt;</a></td>
<td>This type encapsulates either a value of type <span class="Code">TFirst</span>,
            or <span class="Code">TSecond</span>.</td>
</tr>
<tr>
<td class="IconColumn">
<img src="../../GFX/PublicClass.gif" alt="Public Class" /></td>
<td>