title: Unable to use primary constructor parameter
body: <p>I am playing with new features of C# 6.0<br>I have the following line of code </p>
  
  <pre><code>public class Circle(int radius)
  {
      public double circumference =&gt; 2 * 3.14 * radius;
  }
  </code></pre>
  
  <p>Above code doesn't work and gives an error "The name radius doesn't exist in current context"</p>
  
  <p>but when I use </p>
  
  <pre><code>public class Circle(int radius)
  {
      int Radius = radius;
      public double circumference =&gt; 2 * 3.14 * Radius;
  }
  </code></pre>
  
  <p>code just works fine.<br>
  Is this Some sort of bug from VS as its CTP or something is wrong with my code. as i believe i should be able to use parameter of primary constructor inside the constructor whithout setting it to some other variable.</p>