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<h1 id="migrating-from-version-26-to-27">Migrating from version 26 to 27</h1>
<h2 id="csvconfiguration.whitespacechars">CsvConfiguration.WhiteSpaceChars</h2>
<ul>
<li>Removed <code>\t</code> from the array of default characters.</li>
</ul>
<p>If you are expecting <code>\t</code> to be trimmed, you will need to add this to the
whitespace characters.</p>
<pre><code class="language-cs">var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
WhiteSpaceChars = new[] { ' ', '\t' },
};
</code></pre>
<h2 id="iparserconfiguration">IParserConfiguration</h2>
<ul>
<li>Added property <code>bool DetectDelimiter { get; }</code>.</li>
<li>Added property <code>string[] DetectDelimiterValues { get; }</code>.</li>
</ul>
<p>Any class that implements <code>IParserConfiguration</code> will need these changes
applied to it.</p>
<h2 id="iwriter">IWriter</h2>
<ul>
<li>Added method <code>Task WriteRecordsAsync<T>(IAsyncEnumerable<T> records, CancellationToken cancellationToken = default)</code>.
This does not apply to projects that reference the <code>net45</code> version of CsvHelper.</li>
</ul>
<p>Any class that implements <code>IWriter</code> will need these changes applied to it.</p>
<h2 id="iparser">IParser</h2>
<ul>
<li>Added property <code>string Delimiter { get; }</code>.</li>
</ul>
<p>Any class that implements <code>IParser</code> will need these changes applied to it.</p>
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