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+<h2>Collection Constraints (NUnit 2.4)</h2>
+
+<p>Collection constraints perform tests that are specific to collections.
+   The following collection constraints are provided.
+   
+<table class="constraints">
+<tr><th>Syntax Helper</th><th>Constructor</th><th>Operation</th></tr>
+<tr><td>Is.All...<br>Has.All...</td><td>AllItemsConstraint( Constraint )</td></td><td>applies a constraint to each item in a collection, succeeding only if all of them succeed</td></tr>
+<tr><td>Has.Some...</td><td>SomeItemsConstraint( Constraint )</td></td><td>applies a constraint to each item in a collection, succeeding if at least one of them succeeds</td></tr>
+<tr><td>Has.None...</td><td>NoItemConstraint( Constraint )</td></td><td>applies a constraint to each item in a collection, succeeding only if all of them fail</td></tr>
+<tr><td>Is.Unique</td><td>UniqueItemsConstraint()</td></td><td>tests that a collection contains only unique items</td></tr>
+<tr><td>Has.Member( object )</td><td>CollectionContainsConstraint( object )</td></td><td>tests that a collection contains an object</td></tr>
+<tr><td>Is.EquivalentTo( IEnumerable )</td><td>CollectionEquivalentConstraint( ICollection )</td></td><td>tests that two collections are equivalent</td></tr>
+<tr><td>Is.SubsetOf( IEnumerable )</td><td>CollectionSubsetConstraint( ICollection )</td></td><td>tests that one collection is a subset of another</td></tr>
+</table>
+
+<h4>Notes</h4>
+
+<ol>
+<li>Two collections are equivalent if they contain the same items, in any order.
+<li>To compare collections for equality, use Is.EqualTo().
+<li>Has.Member uses object equality to find an object in a collection. To check
+for an object equal to an item the collection, use Has.Some.EqualTo().
+<li>Beginning with NUnit 2.4.2, use of a collection constraint with a non-collection
+argument causes an error rather than a test failure. This avoids false positives
+when the collection constraint is negated.
+<li>Beginning with NUnit 2.4.6, you may use any object implementing IEnumerable
+in place of a collection.
+</ol>
+
+<h4>Examples of Use</h4>
+
+<div class="code" style="width: 38em"><pre>
+int[] iarray = new int[] { 1, 2, 3 };
+string[] sarray = new string[] { "a", "b", "c" };
+
+Assert.That( iarray, Is.All.Not.Null );
+Assert.That( sarray, Is.All.InstanceOfType(typeof(string)) );
+Assert.That( iarray, Is.All.GreaterThan(0) );
+                 
+Assert.That( sarray, Is.Unique );
+
+Assert.That( iarray, List.Contains(3) );
+Assert.That( sarray, List.Contains("b") );
+Assert.That( sarray, List.Not.Contains("x") );
+
+Assert.That( new string[] { "c", "a", "b" }, Is.EquivalentTo( sarray ) );
+Assert.That( new int[] { 1, 2, 2 }, Is.Not.EquivalentTo( iarray ) );
+Assert.That( new int[] { 1, 3 }, Is.SubsetOf( iarray ) );
+
+// Using inheritance
+Expect( iarray, All.GreaterThan( 0 ) );
+Expect( sarray, Contains("b") );
+Expect( new int[] { 1, 3 }, SubsetOf( iarray ) );
+</pre></div>
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