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<title>Class SeqPair&lt;T&gt; | HiAPI-C# 2025 </title>
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<article data-uid="Hi.Common.SeqPair`1">
<h1 id="Hi_Common_SeqPair_1" data-uid="Hi.Common.SeqPair`1" class="text-break">
Class SeqPair&lt;T&gt;
</h1>
<div class="facts text-secondary">
<dl><dt>Namespace</dt><dd><a class="xref" href="Hi.html">Hi</a>.<a class="xref" href="Hi.Common.html">Common</a></dd></dl>
<dl><dt>Assembly</dt><dd>HiGeom.dll</dd></dl>
</div>
<div class="markdown summary"><p>Represents a sequence pair containing previous and current values.
Used to track sequential state changes of a value.</p>
</div>
<div class="markdown conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public class SeqPair&lt;T&gt; : IEquatable&lt;SeqPair&lt;T&gt;&gt;, IWriteBin</code></pre>
</div>
<h4 class="section">Type Parameters</h4>
<dl class="parameters">
<dt><code>T</code></dt>
<dd><p>The type of values stored in the sequence pair</p>
</dd>
</dl>
<dl class="typelist inheritance">
<dt>Inheritance</dt>
<dd>
<div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></div>
<div><span class="xref">SeqPair&lt;T&gt;</span></div>
</dd>
</dl>
<dl class="typelist implements">
<dt>Implements</dt>
<dd>
<div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.iequatable-1">IEquatable</a>&lt;<a class="xref" href="Hi.Common.SeqPair-1.html">SeqPair</a>&lt;T&gt;&gt;</div>
<div><a class="xref" href="Hi.Common.IWriteBin.html">IWriteBin</a></div>
</dd>
</dl>
<dl class="typelist inheritedMembers">
<dt>Inherited Members</dt>
<dd>
<div>
<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)">object.Equals(object, object)</a>
</div>
<div>
<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.gettype">object.GetType()</a>
</div>
<div>
<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone">object.MemberwiseClone()</a>
</div>
<div>
<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.referenceequals">object.ReferenceEquals(object, object)</a>
</div>
</dd></dl>
<dl class="typelist extensionMethods">
<dt>Extension Methods</dt>
<dd>
<div>
<a class="xref" href="Hi.Common.BinIoUtil.html#Hi_Common_BinIoUtil_ToBytes_Hi_Common_IWriteBin_">BinIoUtil.ToBytes(IWriteBin)</a>
</div>
<div>
<a class="xref" href="Hi.Common.DuplicateUtil.html#Hi_Common_DuplicateUtil_TryDuplicate__1___0_System_Object___">DuplicateUtil.TryDuplicate&lt;TSelf&gt;(TSelf, params object[])</a>
</div>
<div>
<a class="xref" href="Hi.Common.InvokeUtil.html#Hi_Common_InvokeUtil_SelfInvoke__1___0_System_Action___0__">InvokeUtil.SelfInvoke&lt;TSrc&gt;(TSrc, Action&lt;TSrc&gt;)</a>
</div>
<div>
<a class="xref" href="Hi.Common.InvokeUtil.html#Hi_Common_InvokeUtil_SelfInvoke__2___0_System_Func___0___1__">InvokeUtil.SelfInvoke&lt;TSrc, TDst&gt;(TSrc, Func&lt;TSrc, TDst&gt;)</a>
</div>
<div>
<a class="xref" href="Hi.Coloring.ColorUtil.html#Hi_Coloring_ColorUtil_GetGloomyColor_System_Object_System_Double_System_Double_">ColorUtil.GetGloomyColor(object, double, double)</a>
</div>
<div>
<a class="xref" href="Hi.Common.NameUtil.html#Hi_Common_NameUtil_GetSelectionName_System_Object_">NameUtil.GetSelectionName(object)</a>
</div>
<div>
<a class="xref" href="Hi.Common.StringUtil.html#Hi_Common_StringUtil_GetPropertyStringIfToStringNotOverloaded_System_Object_System_Boolean_System_Boolean_">StringUtil.GetPropertyStringIfToStringNotOverloaded(object, bool, bool)</a>
</div>
<div>
<a class="xref" href="Hi.Parallels.LockUtil.html#Hi_Parallels_LockUtil_Lock_System_Object_">LockUtil.Lock(object)</a>
</div>
</dd></dl>
<h2 class="section" id="constructors">Constructors
</h2>
<a id="Hi_Common_SeqPair_1__ctor_" data-uid="Hi.Common.SeqPair`1.#ctor*"></a>
<h3 id="Hi_Common_SeqPair_1__ctor" data-uid="Hi.Common.SeqPair`1.#ctor">
SeqPair()
</h3>
<div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="Hi.Common.SeqPair-1.html">SeqPair&lt;T&gt;</a> class
with default values for previous and current elements.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public SeqPair()</code></pre>
</div>
<a id="Hi_Common_SeqPair_1__ctor_" data-uid="Hi.Common.SeqPair`1.#ctor*"></a>
<h3 id="Hi_Common_SeqPair_1__ctor_System_IO_BinaryReader_System_Func_System_IO_BinaryReader__0__" data-uid="Hi.Common.SeqPair`1.#ctor(System.IO.BinaryReader,System.Func{System.IO.BinaryReader,`0})">
SeqPair(BinaryReader, Func&lt;BinaryReader, T&gt;)
</h3>
<div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="Hi.Common.SeqPair-1.html">SeqPair&lt;T&gt;</a> class by deserializing from binary data.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public SeqPair(BinaryReader reader, Func&lt;BinaryReader, T&gt; Generator)</code></pre>
</div>
<h4 class="section">Parameters</h4>
<dl class="parameters">
<dt><code>reader</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.io.binaryreader">BinaryReader</a></dt>
<dd><p>The binary reader to read data from</p>
</dd>
<dt><code>Generator</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.io.binaryreader">BinaryReader</a>, T&gt;</dt>
<dd><p>A function that creates objects of type T from binary data</p>
</dd>
</dl>
<a id="Hi_Common_SeqPair_1__ctor_" data-uid="Hi.Common.SeqPair`1.#ctor*"></a>
<h3 id="Hi_Common_SeqPair_1__ctor__0__0_" data-uid="Hi.Common.SeqPair`1.#ctor(`0,`0)">
SeqPair(T, T)
</h3>
<div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="Hi.Common.SeqPair-1.html">SeqPair&lt;T&gt;</a> class
with specified previous and current values.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public SeqPair(T pre, T cur)</code></pre>
</div>
<h4 class="section">Parameters</h4>
<dl class="parameters">
<dt><code>pre</code> <span class="xref">T</span></dt>
<dd><p>The previous value in the sequence</p>
</dd>
<dt><code>cur</code> <span class="xref">T</span></dt>
<dd><p>The current value in the sequence</p>
</dd>
</dl>
<h2 class="section" id="fields">Fields
</h2>
<h3 id="Hi_Common_SeqPair_1_cur" data-uid="Hi.Common.SeqPair`1.cur">
cur
</h3>
<div class="markdown level1 summary"><p>Gets or sets the current value in the sequence.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public T cur</code></pre>
</div>
<h4 class="section">Field Value</h4>
<dl class="parameters">
<dt><span class="xref">T</span></dt>
<dd></dd>
</dl>
<h3 id="Hi_Common_SeqPair_1_pre" data-uid="Hi.Common.SeqPair`1.pre">
pre
</h3>
<div class="markdown level1 summary"><p>Gets or sets the previous value in the sequence.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public T pre</code></pre>
</div>
<h4 class="section">Field Value</h4>
<dl class="parameters">
<dt><span class="xref">T</span></dt>
<dd></dd>
</dl>
<h2 class="section" id="methods">Methods
</h2>
<a id="Hi_Common_SeqPair_1_Equals_" data-uid="Hi.Common.SeqPair`1.Equals*"></a>
<h3 id="Hi_Common_SeqPair_1_Equals_Hi_Common_SeqPair__0__" data-uid="Hi.Common.SeqPair`1.Equals(Hi.Common.SeqPair{`0})">
Equals(SeqPair&lt;T&gt;)
</h3>
<div class="markdown level1 summary"><p>Indicates whether the current object is equal to another object of the same type.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public bool Equals(SeqPair&lt;T&gt; other)</code></pre>
</div>
<h4 class="section">Parameters</h4>
<dl class="parameters">
<dt><code>other</code> <a class="xref" href="Hi.Common.SeqPair-1.html">SeqPair</a>&lt;T&gt;</dt>
<dd><p>An object to compare with this object.</p>
</dd>
</dl>
<h4 class="section">Returns</h4>
<dl class="parameters">
<dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></dt>
<dd><p><a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">true</a> if the current object is equal to the <code class="paramref">other</code> parameter; otherwise, <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">false</a>.</p>
</dd>
</dl>
<a id="Hi_Common_SeqPair_1_Equals_" data-uid="Hi.Common.SeqPair`1.Equals*"></a>
<h3 id="Hi_Common_SeqPair_1_Equals_System_Object_" data-uid="Hi.Common.SeqPair`1.Equals(System.Object)">
Equals(object)
</h3>
<div class="markdown level1 summary"><p>Determines whether the specified object is equal to the current object.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override bool Equals(object obj)</code></pre>
</div>
<h4 class="section">Parameters</h4>
<dl class="parameters">
<dt><code>obj</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></dt>
<dd><p>The object to compare with the current object.</p>
</dd>
</dl>
<h4 class="section">Returns</h4>
<dl class="parameters">
<dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></dt>
<dd><p><a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">true</a> if the specified object is equal to the current object; otherwise, <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">false</a>.</p>
</dd>
</dl>
<a id="Hi_Common_SeqPair_1_GetHashCode_" data-uid="Hi.Common.SeqPair`1.GetHashCode*"></a>
<h3 id="Hi_Common_SeqPair_1_GetHashCode" data-uid="Hi.Common.SeqPair`1.GetHashCode">
GetHashCode()
</h3>
<div class="markdown level1 summary"><p>Serves as the default hash function.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override int GetHashCode()</code></pre>
</div>
<h4 class="section">Returns</h4>
<dl class="parameters">
<dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
<dd><p>A hash code for the current object.</p>
</dd>
</dl>
<a id="Hi_Common_SeqPair_1_ToString_" data-uid="Hi.Common.SeqPair`1.ToString*"></a>
<h3 id="Hi_Common_SeqPair_1_ToString" data-uid="Hi.Common.SeqPair`1.ToString">
ToString()
</h3>
<div class="markdown level1 summary"><p>Returns a string that represents the current object.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override string ToString()</code></pre>
</div>
<h4 class="section">Returns</h4>
<dl class="parameters">
<dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
<dd><p>A string that represents the current object.</p>
</dd>
</dl>
<a id="Hi_Common_SeqPair_1_WriteBin_" data-uid="Hi.Common.SeqPair`1.WriteBin*"></a>
<h3 id="Hi_Common_SeqPair_1_WriteBin_System_IO_BinaryWriter_" data-uid="Hi.Common.SeqPair`1.WriteBin(System.IO.BinaryWriter)">
WriteBin(BinaryWriter)
</h3>
<div class="markdown level1 summary"><p>Writes the object's data to a binary stream.</p>
</div>
<div class="markdown level1 conceptual"></div>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public void WriteBin(BinaryWriter writer)</code></pre>
</div>
<h4 class="section">Parameters</h4>
<dl class="parameters">
<dt><code>writer</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.io.binarywriter">BinaryWriter</a></dt>
<dd><p>The binary writer to write to</p>
</dd>
</dl>
</article>
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