Provide a cached reusable instance of stringbuilder per thread. It's an optimisation that reduces the number of instances constructed and collected. This is a %[LangWord]static class% and so cannot be inherited or instantiated.
public static class StringBuilderCache
'Declaration
Public MustInherit NotInheritable Class StringBuilderCache
'Usage
Dim instance As StringBuilderCache
System.Object
GrapeCity.CalcEngine.StringBuilderCache