title: Winforms app not opening on a second computer where Visual Studio is not installed
body: <p>I have two computers. On the first, a MacBook Air, I am using Visual Studio 2015 and SQL Server 2014 Express. I am programming a WinForms app and later trying it on a second computer, a Sony. When I program only the WinForms features and try it in Sony, there is no problem. The WinForms  app is working perfectly. </p>
  
  <p>But, when I program a database related WinForms app, the app is not working in the second computer (the Sony). There is no reaction when I click .exe file. SQL Server 2014 Express is installed on the Sony too, but Visual Studio is not.</p>
  
  <p>I am using Linq to SQL class for connection with the <code>.mdf</code> file. Here is my simple example for testing:</p>
  
  <pre><code>readolny LtoSQLDataContext _db = new LtoSQLDataContext();
  var all = _db.articles; // The table's name is article.
  Radlabel1.Text = "&lt;html&gt;There are &lt;b&gt;" + all.Count() + "&lt;/b&gt; articles in our database.";
  </code></pre>
  
  <p>Here is print screen image:</p>
  
  <p><a href="https://i.stack.imgur.com/ig9ve.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ig9ve.jpg" alt="enter image description here"></a></p>
  
  <p>This code is not working in the second computer. Rather, the Winforms app is not opening when click the <code>.exe</code> file. Where is the problem?</p>