title: the 'microsoft.ace.oledb.12.0' provider is not registered on the local machine while reading a excel file in c#
body: <p>I am reading an excel file and I want to access its contents.
  I am using this connection string:</p>
  
  <pre><code>connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0}; Extended Properties=Excel 12.0;", Server.MapPath(fileName));
  </code></pre>
  
  <p>But I see this error:</p>
  
  <blockquote>
    <p>The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local
    machine.</p>
  </blockquote>
  
  <p>My server is running on 64-bit operating system.
  I have installed Microsoft Office Professional Plus 2010(32-bit) and Microsoft Access database engine 2010 on it.</p>
  
  <p>What is the problem?</p>