BadDynamicCall.qhelp

<!DOCTYPE qhelp PUBLIC
  "-//Semmle//qhelp//EN"
  "qhelp.dtd">
<qhelp>
<overview>
<p>Method calls on variables declared with type 'dynamic' are resolved at runtime rather than 
compile-time - the actual type of the instance is determined, and an attempt is made to call a 
method on that type with the appropriate signature. If such a method does not exist, a <code>
RuntimeBinderException</code> is thrown.</p>

<p>This rule identifies calls to instances with the <code>dynamic</code> type where it can be 
statically determined that the call will throw a <code>RuntimeBinderException</code>.</p>

</overview>
<recommendation>
<p>Ensure it is not possible to make a call to a dynamic instance of a type that lacks the 
appropriate method signature for handling that call.</p>

</recommendation>
<example>
<p>In this example the program attempts to call <code>Foo</code> on a class that doesn't have a 
<code>Foo</code> method. This program is guaranteed to fail at runtime with a <code>
RuntimeBinderException</code>.</p>
<sample src="BadDynamicCall.cs" />

</example>
<references>

  <li>MSDN: <a href="http://msdn.microsoft.com/en-gb/library/dd264741.aspx">dynamic (C# Reference)</a>.</li>


</references>
</qhelp>