New tuple syntax not working in C# version 7
<p>I've started trying new features of C# 7 in Visual Studio Enterprise 15 Preview 2. I'm able to run code of other upcoming features like Binary literals, digit separators etc. But the new syntax of initialization of tuples is not working.</p>

<p>Here is my code snippet:</p>

<pre><code>var latLong = new (double lat, double lng) { lat = 0, lng = 0 };
var result = (5, 20);
var result = (count: 5, sum: 20);
</code></pre>

<p>I've followed all the steps mentioned in <a href="https://blog.cdemi.io/exploring-visual-studio-15-preview-and-playing-with-c-7/" rel="nofollow">this</a> blog. Just posting this question if anyone else has also come across this issue. Above code results in compilation failures as shown below:</p>

<pre class="lang-none prettyprint-override"><code>1&gt;Program.cs(18,26,18,27): error CS1031: Type expected
1&gt;Program.cs(18,27,18,33): error CS1525: Invalid expression term 'double'
1&gt;Program.cs(18,34,18,37): error CS1003: Syntax error, ',' expected
1&gt;Program.cs(18,39,18,45): error CS1525: Invalid expression term 'double'
1&gt;Program.cs(18,46,18,49): error CS1003: Syntax error, ',' expected
</code></pre>