XslTransform怎么加载一个xml字符串

XslTransform如何加载一个xml字符串
string   str= " <xsl:stylesheet........... ";
XslTransform   xslt   =   new   XslTransform();
如何将str加载到xslt中间呢?



[解决办法]
MemoryStream ms = new MemoryStream(System.Text.Encoding.Default.GetBytes(str));
XmlReader reader = new XmlTextReader(ms);
xslTransform.Load(reader);