title: Append string to another string after a specified character
body: <p>I have a string <code>a="&lt;tr&gt;i'm working in C#&lt;tr/&gt; abcdefghjiklmnopqr ii oo yy uu hh gg rr"</code>, and <code>b="&lt;td&gt;Finish&lt;/td&gt;&lt;/tr&gt;"</code>. I need string <code>a</code> as </p>
  
  <pre><code>  a="&lt;tr&gt;i'm working in C#&lt;tr/&gt; &lt;td&gt;Finish&lt;/td&gt;&lt;/tr&gt; abcdefghjiklmnopqr ii oo yy uu hh gg rr".
  </code></pre>
  
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  <p>How do we append string in string like above? I asked a same question earlier which was wrong. 
  Here will have to find for first ">" charcter and append b in a.</p>
  
  <p>Please help.</p>