How to append string representation of a specified object to a instance
<p>I have a code like this:</p>

<pre><code>StringBuilder systemCondition = new StringBuilder();
systemCondition.Append("^(");
systemCondition.Append(Regex.Escape(this.Class));
systemCondition.Append(" : ");
systemCondition.Append(Regex.Escape(this.Instance));
systemCondition.Append(")$");
m_afc.QualifiedInstanceFilter = systemCondition.ToString();
</code></pre>

<p>Can any body tell me whats wrong here?
Then what about this code </p>
