tion()     <br />{     <br />&#160;&#160;&#160; IEnumerable&lt;<span class="ValueType">int</span>&gt; source = <span class="Keyword">null</span>;     <br />&#160;&#160;&#160; Assert.Throws&lt;ArgumentNullException&gt;(() =&gt; source.Where(x =&gt; x &gt; 5));     <br />}     <br />    <br />[Test]     <br /><span class="Modifier">public</span>&#160;<span class="ValueType">void</span> NullPredicateThrowsNullArgumentException()     <br />{     <br />&#160;&#160;&#160; <span class="ValueType">int</span>[] sour