ReportViewerの余白の設定

using System;
using System.Windows.Forms;
using System.Xml;
using System.IO;

namespace BlogTest {
    public partial class Form2 : Form {
        public Form2() {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e) {
            reportViewer1.LocalReport.ReportEmbeddedResource = "";
            reportViewer1.LocalReport.ReportPath = "";

            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load("Report1.rdlc");

            XmlElement xmlRoot = xmlDoc.DocumentElement;
            XmlNodeList xmlNode = xmlRoot.GetElementsByTagName("LeftMargin");
            XmlElement xmlLeftMargin = (XmlElement)xmlNode.Item(0);
            
            //値を記憶しているところから持ってくる
            //ここでは、直接指定
            xmlLeftMargin.InnerText = "2cm";    

            reportViewer1.LocalReport.LoadReportDefinition(new StringReader(xmlDoc.InnerXml));
            reportViewer1.RefreshReport();
        }
    }
}