title: change repeated fields
body: <p>table: <code>tbl1</code></p>
  
  <p>Fields:<code>id</code>,<code>name</code></p>
  
  <pre>id       name</pre>
  
  <pre>1        a
  1        a
  1        a
  1        b
  
  </pre>
  
  <p>I like places that have been repeated name and Id(id=1,name=a || id=1,name=a || id=1,name=a).</p>
  
  <p>change to</p>
  
  <p>id=1,name=a1 || id=1,name=a2  || id=1,name=a3</p>
  
  <p>By Linq &amp;&amp; SqlServer</p>