using System;

using System.Xml;

public class Program

{

    public static void Main()

    {

        var xml = @"<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

    <xsl:import href='stylesheets/r_adresetiket.xsl' />

    <xsl:template match='/'>

        <xsl:call-template name='retouradres'>

            <xsl:with-param name='_retouradres' select='data/adresetiket/_retouradres'/>

            <xsl:with-param name='minofdir' select='data/adresetiket/afzendgegevens/afzendgegevens'/>

            <xsl:with-param name='checked' select='data/adresetiket/LB'/>

        </xsl:call-template>

    </xsl:template>

</xsl:stylesheet>";

        var document = new XmlDocument();

        document.LoadXml(xml);

​

        var nodes = document.GetElementsByTagName("xsl:import");

        var node =  nodes[0].Attributes["href"];

        Console.WriteLine("href: " + node.Value);

        nodes = document.GetElementsByTagName("xsl:call-template");

        node =  nodes[0].Attributes["name"];

        Console.WriteLine("name: " + node.Value);

    }

}