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Try:<br />
<br />

<pre><code id="code-20-38029609-1">Dim result As String = System.Text.RegularExpressions.Regex.Replace(input, &quot;(?&lt;=&amp;)amp;(?=#\w+;)&quot;, String.Empty)</code></pre>
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<div>
kaufmed, your idea works on numerical entities like:<br />
&amp;amp;#169;<br />
<br />
But it does not work on named entities like:<br />
&amp;amp;mdash;
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<div class="content wysiwyg-content">
I use ASP.NET / VB.<br />
<br />
How can I fix entities that been encoded twice?<br />
<br />
For example,<br />
&amp;amp;#169;<br />
Should become:<br />
&amp;#169;<br />
<br />

<pre><code id="code-10-27738006-1">&amp;quot; zzz &amp;nbsp; &amp;nbsp;&amp;amp;#169; &amp;amp;nbsp; &amp;nbsp;A&amp;amp;amp;B &amp;amp;nbsp; Hello  &amp;amp; &amp;amp;mdash; World &amp;amp;nbsp; &amp;nbsp; 123 </code></pre>
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I use ASP.NET / VB.

How can I fix entities that been encoded twice?

For example,
&amp;#169;
Should become:
&#169;

(CODE)

kaufmed, your idea works on numerical entities like:
&amp;amp;#169;

But it does not work on named entities like:
&amp;amp;mdash;

ASP.NET / VB / REGEX: Fix Double Entities

I use ASP.NET / VB.

How can I fix entities that been encoded twice?

For example,
&amp;amp;#169;
Should become:
&amp;#169;

(CODE)

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,

Visual Basic.NET

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.

Regular Expressions

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications