S3063_vb.net.html

<p><code>StringBuilder</code> instances that are <code>append</code>ed but never <code>toString</code>ed needlessly clutter the code, and worse are a
drag on performance. Either they should be removed, or the missing <code>toString</code> call added.</p>
<h2>Noncompliant Code Example</h2>
<pre>
Public Sub doSomething(ByVal strings As List(Of String))
    Dim sb As StringBuilder = New StringBuilder()
    sb.Append("Got: ")

    For Each str As String In strings
        sb.Append(str).Append(", ")
    Next
End Sub
</pre>
<h2>Compliant Solution</h2>
<pre>
Public Sub doSomething(ByVal strings As List(Of String))
    For Each str As String In strings
    Next
End Sub
</pre>
<p>or</p>
<pre>
Public Sub doSomething(ByVal strings As List(Of String))
    Dim sb As StringBuilder = New StringBuilder()
    sb.Append("Got: ")

    For Each str As String In strings
        sb.Append(str).Append(", ")
    Next

    My.Application.Log.WriteEntry(sb.toString)
End Sub
</pre>
<h2>Exceptions</h2>
<p>This rule ignores <code>StringBuilder</code>s that are passed as method arguments on the grounds that they are likely <code>toString</code>ed
there.</p>