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<article class="content wrap" id="_content" data-uid="X10D.Collections.EnumerableExtensions">
<h1 id="X10D_Collections_EnumerableExtensions" data-uid="X10D.Collections.EnumerableExtensions" class="text-break">Class EnumerableExtensions
</h1>
<div class="markdown level0 summary"><p>Extension methods for <see cref="!:IEnumerable&lt;T>"></see>.</p>
</div>
<div class="markdown level0 conceptual"></div>
<div class="inheritance">
<h5>Inheritance</h5>
<div class="level0"><span class="xref">System.Object</span></div>
<div class="level1"><span class="xref">EnumerableExtensions</span></div>
</div>
<h6><strong>Namespace</strong>: <a class="xref" href="X10D.Collections.html">X10D.Collections</a></h6>
<h6><strong>Assembly</strong>: X10D.dll</h6>
<h5 id="X10D_Collections_EnumerableExtensions_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static class EnumerableExtensions : object</code></pre>
</div>
<h3 id="methods">Methods
</h3>
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<a href="https://github.com/oliverbooth/X10D/new/main/apiSpec/new?filename=X10D_Collections_EnumerableExtensions_CountWhereNot__1_IEnumerable___0__Func___0_System_Boolean__.md&amp;value=---%0Auid%3A%20X10D.Collections.EnumerableExtensions.CountWhereNot%60%601(IEnumerable%7B%60%600%7D%2CFunc%7B%60%600%2CSystem.Boolean%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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<a id="X10D_Collections_EnumerableExtensions_CountWhereNot_" data-uid="X10D.Collections.EnumerableExtensions.CountWhereNot*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_CountWhereNot__1_IEnumerable___0__Func___0_System_Boolean__" data-uid="X10D.Collections.EnumerableExtensions.CountWhereNot``1(IEnumerable{``0},Func{``0,System.Boolean})">CountWhereNot&lt;TSource&gt;(IEnumerable&lt;TSource&gt;, Func&lt;TSource, Boolean&gt;)</h4>
<div class="markdown level1 summary"><p>Returns a number that represents how many elements in the specified sequence do not satisfy a condition.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static int CountWhereNot&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, bool&gt; predicate)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>A sequence that contains elements to be tested and counted.</p>
</td>
</tr>
<tr>
<td><span class="xref">Func</span>&lt;TSource, <span class="xref">System.Boolean</span>&gt;</td>
<td><span class="parametername">predicate</span></td>
<td><p>A function to test each element for a condition.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><p>A number that represents how many elements in the sequence do not satisfy the condition in the
<code data-dev-comment-type="paramref" class="paramref">predicate</code> function.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">TSource</span></td>
<td><p>The type of the elements of <code data-dev-comment-type="paramref" class="paramref">source</code>.</p>
</td>
</tr>
</tbody>
</table>
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<a href="https://github.com/oliverbooth/X10D/new/main/apiSpec/new?filename=X10D_Collections_EnumerableExtensions_DisposeAll__1_IEnumerable___0__.md&amp;value=---%0Auid%3A%20X10D.Collections.EnumerableExtensions.DisposeAll%60%601(IEnumerable%7B%60%600%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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<a id="X10D_Collections_EnumerableExtensions_DisposeAll_" data-uid="X10D.Collections.EnumerableExtensions.DisposeAll*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_DisposeAll__1_IEnumerable___0__" data-uid="X10D.Collections.EnumerableExtensions.DisposeAll``1(IEnumerable{``0})">DisposeAll&lt;T&gt;(IEnumerable&lt;T&gt;)</h4>
<div class="markdown level1 summary"><p>Calls <see cref="!:IDisposable.Dispose"></see> on all elements of the <see cref="!:IEnumerable&lt;T>"></see>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static void DisposeAll&lt;T&gt;(this IEnumerable&lt;T&gt; source)
where T : IDisposable</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;T&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>The enumerable collection whose elements to dispose.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">T</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code>.</p>
</td>
</tr>
</tbody>
</table>
<h5 id="X10D_Collections_EnumerableExtensions_DisposeAll__1_IEnumerable___0___seealso">See Also</h5>
<div class="seealso">
<div><a class="xref" href="X10D.Collections.CollectionExtensions.html#X10D_Collections_CollectionExtensions_ClearAndDisposeAll__1_ICollection___0__">ClearAndDisposeAll&lt;T&gt;(ICollection&lt;T&gt;)</a></div>
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<a id="X10D_Collections_EnumerableExtensions_DisposeAllAsync_" data-uid="X10D.Collections.EnumerableExtensions.DisposeAllAsync*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_DisposeAllAsync__1_IEnumerable___0__" data-uid="X10D.Collections.EnumerableExtensions.DisposeAllAsync``1(IEnumerable{``0})">DisposeAllAsync&lt;T&gt;(IEnumerable&lt;T&gt;)</h4>
<div class="markdown level1 summary"><p>Asynchronously calls <see cref="!:IAsyncDisposable.DisposeAsync"></see> on all elements of the
<see cref="!:IEnumerable&lt;T>"></see>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static Task DisposeAllAsync&lt;T&gt;(this IEnumerable&lt;T&gt; source)
where T : IAsyncDisposable</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;T&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>The enumerable collection whose elements to dispose.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">Task</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">T</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code>.</p>
</td>
</tr>
</tbody>
</table>
<h5 id="X10D_Collections_EnumerableExtensions_DisposeAllAsync__1_IEnumerable___0___seealso">See Also</h5>
<div class="seealso">
<div><a class="xref" href="X10D.Collections.CollectionExtensions.html#X10D_Collections_CollectionExtensions_ClearAndDisposeAllAsync__1_ICollection___0__">ClearAndDisposeAllAsync&lt;T&gt;(ICollection&lt;T&gt;)</a></div>
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<a href="https://github.com/oliverbooth/X10D/new/main/apiSpec/new?filename=X10D_Collections_EnumerableExtensions_FirstWhereNot__1_IEnumerable___0__Func___0_System_Boolean__.md&amp;value=---%0Auid%3A%20X10D.Collections.EnumerableExtensions.FirstWhereNot%60%601(IEnumerable%7B%60%600%7D%2CFunc%7B%60%600%2CSystem.Boolean%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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<a id="X10D_Collections_EnumerableExtensions_FirstWhereNot_" data-uid="X10D.Collections.EnumerableExtensions.FirstWhereNot*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_FirstWhereNot__1_IEnumerable___0__Func___0_System_Boolean__" data-uid="X10D.Collections.EnumerableExtensions.FirstWhereNot``1(IEnumerable{``0},Func{``0,System.Boolean})">FirstWhereNot&lt;TSource&gt;(IEnumerable&lt;TSource&gt;, Func&lt;TSource, Boolean&gt;)</h4>
<div class="markdown level1 summary"><p>Returns the first element in a sequence that does not satisfy a specified condition.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static TSource FirstWhereNot&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, bool&gt; predicate)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> to return an element from.</p>
</td>
</tr>
<tr>
<td><span class="xref">Func</span>&lt;TSource, <span class="xref">System.Boolean</span>&gt;</td>
<td><span class="parametername">predicate</span></td>
<td><p>A function to test each element for a condition.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">TSource</span></td>
<td><p>The first element in the sequence that fails the test in the specified predicate function.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">TSource</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code></p>
</td>
</tr>
</tbody>
</table>
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<a href="https://github.com/oliverbooth/X10D/new/main/apiSpec/new?filename=X10D_Collections_EnumerableExtensions_FirstWhereNotOrDefault__1_IEnumerable___0__Func___0_System_Boolean__.md&amp;value=---%0Auid%3A%20X10D.Collections.EnumerableExtensions.FirstWhereNotOrDefault%60%601(IEnumerable%7B%60%600%7D%2CFunc%7B%60%600%2CSystem.Boolean%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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<a id="X10D_Collections_EnumerableExtensions_FirstWhereNotOrDefault_" data-uid="X10D.Collections.EnumerableExtensions.FirstWhereNotOrDefault*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_FirstWhereNotOrDefault__1_IEnumerable___0__Func___0_System_Boolean__" data-uid="X10D.Collections.EnumerableExtensions.FirstWhereNotOrDefault``1(IEnumerable{``0},Func{``0,System.Boolean})">FirstWhereNotOrDefault&lt;TSource&gt;(IEnumerable&lt;TSource&gt;, Func&lt;TSource, Boolean&gt;)</h4>
<div class="markdown level1 summary"><p>Returns the first element in a sequence that does not satisfy a specified condition.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static TSource FirstWhereNotOrDefault&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, bool&gt; predicate)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> to return an element from.</p>
</td>
</tr>
<tr>
<td><span class="xref">Func</span>&lt;TSource, <span class="xref">System.Boolean</span>&gt;</td>
<td><span class="parametername">predicate</span></td>
<td><p>A function to test each element for a condition.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">TSource</span></td>
<td><p><span class="xref">langword_csharp_default(TSource)</span> if <code data-dev-comment-type="paramref" class="paramref">source</code> is empty or if no element passes the test specified
by <code data-dev-comment-type="paramref" class="paramref">predicate</code>; otherwise, the first element in <code data-dev-comment-type="paramref" class="paramref">source</code> that fails the test
specified by <code data-dev-comment-type="paramref" class="paramref">predicate</code>.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">TSource</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code></p>
</td>
</tr>
</tbody>
</table>
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<a id="X10D_Collections_EnumerableExtensions_For_" data-uid="X10D.Collections.EnumerableExtensions.For*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_For__1_IEnumerable___0__Action_System_Int32___0__" data-uid="X10D.Collections.EnumerableExtensions.For``1(IEnumerable{``0},Action{System.Int32,``0})">For&lt;T&gt;(IEnumerable&lt;T&gt;, Action&lt;Int32, T&gt;)</h4>
<div class="markdown level1 summary"><p>Performs the specified action on each element of the <see cref="!:IEnumerable&lt;T>"></see>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static void For&lt;T&gt;(this IEnumerable&lt;T&gt; source, Action&lt;int, T&gt; action)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;T&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>The <see cref="!:IEnumerable&lt;T>"></see> whose elements on which to perform <code data-dev-comment-type="paramref" class="paramref">action</code>.</p>
</td>
</tr>
<tr>
<td><span class="xref">Action</span>&lt;<span class="xref">System.Int32</span>, T&gt;</td>
<td><span class="parametername">action</span></td>
<td><p>The <see cref="!:Action&lt;T, T>"></see> delegate to perform on each element of the <see cref="!:IEnumerable&lt;T>"></see>. The
<see cref="!:System.Int32"></see> argument passed to this delegate represents the index.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">T</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code>.</p>
</td>
</tr>
</tbody>
</table>
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<a id="X10D_Collections_EnumerableExtensions_ForEach_" data-uid="X10D.Collections.EnumerableExtensions.ForEach*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_ForEach__1_IEnumerable___0__Action___0__" data-uid="X10D.Collections.EnumerableExtensions.ForEach``1(IEnumerable{``0},Action{``0})">ForEach&lt;T&gt;(IEnumerable&lt;T&gt;, Action&lt;T&gt;)</h4>
<div class="markdown level1 summary"><p>Performs the specified action on each element of the <see cref="!:IEnumerable&lt;T>"></see>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static void ForEach&lt;T&gt;(this IEnumerable&lt;T&gt; source, Action&lt;T&gt; action)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;T&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>The <see cref="!:IEnumerable&lt;T>"></see> whose elements on which to perform <code data-dev-comment-type="paramref" class="paramref">action</code>.</p>
</td>
</tr>
<tr>
<td><span class="xref">Action</span>&lt;T&gt;</td>
<td><span class="parametername">action</span></td>
<td><p>The <see cref="!:Action&lt;T>"></see> delegate to perform on each element of the <see cref="!:IEnumerable&lt;T>"></see>.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">T</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code>.</p>
</td>
</tr>
</tbody>
</table>
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<a id="X10D_Collections_EnumerableExtensions_LastWhereNot_" data-uid="X10D.Collections.EnumerableExtensions.LastWhereNot*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_LastWhereNot__1_IEnumerable___0__Func___0_System_Boolean__" data-uid="X10D.Collections.EnumerableExtensions.LastWhereNot``1(IEnumerable{``0},Func{``0,System.Boolean})">LastWhereNot&lt;TSource&gt;(IEnumerable&lt;TSource&gt;, Func&lt;TSource, Boolean&gt;)</h4>
<div class="markdown level1 summary"><p>Returns the last element in a sequence that does not satisfy a specified condition.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static TSource LastWhereNot&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, bool&gt; predicate)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> to return an element from.</p>
</td>
</tr>
<tr>
<td><span class="xref">Func</span>&lt;TSource, <span class="xref">System.Boolean</span>&gt;</td>
<td><span class="parametername">predicate</span></td>
<td><p>A function to test each element for a condition.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">TSource</span></td>
<td><p>The last element in the sequence that fails the test in the specified predicate function.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">TSource</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code></p>
</td>
</tr>
</tbody>
</table>
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<a href="https://github.com/oliverbooth/X10D/new/main/apiSpec/new?filename=X10D_Collections_EnumerableExtensions_LastWhereNotOrDefault__1_IEnumerable___0__Func___0_System_Boolean__.md&amp;value=---%0Auid%3A%20X10D.Collections.EnumerableExtensions.LastWhereNotOrDefault%60%601(IEnumerable%7B%60%600%7D%2CFunc%7B%60%600%2CSystem.Boolean%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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<a id="X10D_Collections_EnumerableExtensions_LastWhereNotOrDefault_" data-uid="X10D.Collections.EnumerableExtensions.LastWhereNotOrDefault*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_LastWhereNotOrDefault__1_IEnumerable___0__Func___0_System_Boolean__" data-uid="X10D.Collections.EnumerableExtensions.LastWhereNotOrDefault``1(IEnumerable{``0},Func{``0,System.Boolean})">LastWhereNotOrDefault&lt;TSource&gt;(IEnumerable&lt;TSource&gt;, Func&lt;TSource, Boolean&gt;)</h4>
<div class="markdown level1 summary"><p>Returns the last element in a sequence that does not satisfy a specified condition.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static TSource LastWhereNotOrDefault&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, bool&gt; predicate)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> to return an element from.</p>
</td>
</tr>
<tr>
<td><span class="xref">Func</span>&lt;TSource, <span class="xref">System.Boolean</span>&gt;</td>
<td><span class="parametername">predicate</span></td>
<td><p>A function to test each element for a condition.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">TSource</span></td>
<td><p><span class="xref">langword_csharp_default(TSource)</span> if <code data-dev-comment-type="paramref" class="paramref">source</code> is empty or if no element passes the test specified
by <code data-dev-comment-type="paramref" class="paramref">predicate</code>; otherwise, the last element in <code data-dev-comment-type="paramref" class="paramref">source</code> that fails the test
specified by <code data-dev-comment-type="paramref" class="paramref">predicate</code>.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">TSource</span></td>
<td><p>The type of the elements in <code data-dev-comment-type="paramref" class="paramref">source</code></p>
</td>
</tr>
</tbody>
</table>
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<a id="X10D_Collections_EnumerableExtensions_Shuffled_" data-uid="X10D.Collections.EnumerableExtensions.Shuffled*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_Shuffled__1_IEnumerable___0__System_Nullable_Random__" data-uid="X10D.Collections.EnumerableExtensions.Shuffled``1(IEnumerable{``0},System.Nullable{Random})">Shuffled&lt;T&gt;(IEnumerable&lt;T&gt;, Nullable&lt;Random&gt;)</h4>
<div class="markdown level1 summary"><p>Reorganizes the elements in an enumerable by implementing a Fisher-Yates shuffle, and returns th shuffled result.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static IReadOnlyCollection&lt;T&gt; Shuffled&lt;T&gt;(this IEnumerable&lt;T&gt; source, Random? random = null)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;T&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>The <see cref="!:IEnumerable&lt;T>"></see> to shuffle.</p>
</td>
</tr>
<tr>
<td><span class="xref">System.Nullable</span>&lt;<span class="xref">Random</span>&gt;</td>
<td><span class="parametername">random</span></td>
<td><p>Optional. The <see cref="!:System.Random"></see> instance to use for the shuffling.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IReadOnlyCollection</span>&lt;T&gt;</td>
<td><p>The shuffled collection.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">T</span></td>
<td><p>The element type.</p>
</td>
</tr>
</tbody>
</table>
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<a id="X10D_Collections_EnumerableExtensions_WhereNot_" data-uid="X10D.Collections.EnumerableExtensions.WhereNot*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_WhereNot__1_IEnumerable___0__Func___0_System_Boolean__" data-uid="X10D.Collections.EnumerableExtensions.WhereNot``1(IEnumerable{``0},Func{``0,System.Boolean})">WhereNot&lt;TSource&gt;(IEnumerable&lt;TSource&gt;, Func&lt;TSource, Boolean&gt;)</h4>
<div class="markdown level1 summary"><p>Filters a sequence of values based on a predicate, such that all elements in the result do not match the predicate.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static IEnumerable&lt;TSource&gt; WhereNot&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, bool&gt; predicate)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> to filter.</p>
</td>
</tr>
<tr>
<td><span class="xref">Func</span>&lt;TSource, <span class="xref">System.Boolean</span>&gt;</td>
<td><span class="parametername">predicate</span></td>
<td><p>A function to test each element for a condition.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> that contains elements from the input sequence that do not satisfy the condition.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">TSource</span></td>
<td><p>The type of the elements of <code data-dev-comment-type="paramref" class="paramref">source</code>.</p>
</td>
</tr>
</tbody>
</table>
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<a id="X10D_Collections_EnumerableExtensions_WhereNotNull_" data-uid="X10D.Collections.EnumerableExtensions.WhereNotNull*"></a>
<h4 id="X10D_Collections_EnumerableExtensions_WhereNotNull__1_IEnumerable___0__" data-uid="X10D.Collections.EnumerableExtensions.WhereNotNull``1(IEnumerable{``0})">WhereNotNull&lt;TSource&gt;(IEnumerable&lt;TSource&gt;)</h4>
<div class="markdown level1 summary"><p>Filters a sequence of values by omitting elements that are <span class="xref">null</span> (<span class="xref">langword_csharp_Nothing</span> in
Visual Basic).</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static IEnumerable&lt;TSource&gt; WhereNotNull&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><span class="parametername">source</span></td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> to filter.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">IEnumerable</span>&lt;TSource&gt;</td>
<td><p>An <see cref="!:IEnumerable&lt;T>"></see> that contains elements from the input sequence that are not <span class="xref">null</span>
(<span class="xref">langword_csharp_Nothing</span> in Visual Basic).</p>
</td>
</tr>
</tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="parametername">TSource</span></td>
<td><p>The type of the elements of <code data-dev-comment-type="paramref" class="paramref">source</code>.</p>
</td>
</tr>
</tbody>
</table>
</article>
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