private StringBuilderPool.ItemHolder _builder; // Not readonly to avoid struct-copy on Dispose(), and to avoid VerificationException when medium-trust AppDomain
public AppendBuilderCreator(StringBuilder appendTarget, bool mustBeEmpty)
{
_appendTarget = appendTarget;
if (_appendTarget.Length > 0 && mustBeEmpty)
{
_builder = _builderPool.Acquire();
}
else
{
_builder = new StringBuilderPool.ItemHolder(_appendTarget, null, 0);
}
}