title: DataSource parameter in connection string yields "Keyword not supported"
body: <p>My code:</p>
  
  <pre><code>SqlConnection conn = new SqlConnection("DataSource=a;InitialCatalog=b;User ID=c;Password=d");
  </code></pre>
  
  <p>And I get error:</p>
  
  <pre><code>Keyword not supported: 'datasource'.
  </code></pre>
  
  <p>What to do?</p>