XsltSettings.TrustedXslt-Eigenschaft

// Create a resolver and specify the necessary credentials.
XmlSecureResolver resolver = new XmlSecureResolver(new XmlUrlResolver(), "http://serverName/data/");
System.Net.NetworkCredential myCred;
myCred  = new System.Net.NetworkCredential(UserName,SecurelyStoredPassword,Domain);  
resolver.Credentials = myCred;

// Create the XslCompiledTransform object and load the style sheet.
XslCompiledTransform xslt = new XslCompiledTransform();
xslt.Load("http://serverName/data/script.xsl", XsltSettings.TrustedXslt, resolver);