比对两个Word文件内容是否一致的C#解决办法

using System;
using System.Windows.Forms;
using System.Diagnostics;
using Microsoft.Office.Interop.Word;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
//加载之前首先判断系统中是否包含WORD.EXE进程，如果包含，将其杀死,然后再进行查看
KillProcess();

MessageBox.Show(CompareWordFile(@"C:\1.DOC", @"C:\2.DOC").ToString());
}

public bool CompareWordFile(String source, String target)
{
object filename = source;
var targetFileName = target;
object missing = System.Reflection.Missing.Value;
object readonlyobj = false;
var app = new ApplicationClass { Visible = false };
var doc = app.Documents.Open(ref filename, ref missing, ref readonlyobj, ref missing,
ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing);
doc.TrackRevisions = true;
doc.ShowRevisions = true;
doc.PrintRevisions = true;
object comparetarget = WdCompareTarget.wdCompareTargetNew;
doc.Compare(targetFileName, ref missing, ref comparetarget, ref missing, ref missing, ref missing, ref missing, ref missing);
var changeCount = app.ActiveDocument.Revisions.Count;
Object saveChanges = WdSaveOptions.wdDoNotSaveChanges;
doc.Close(ref saveChanges, ref missing, ref missing);
app.Quit(ref saveChanges, ref missing, ref missing);
return changeCount == 0;
}

public void KillProcess()
{
const string processName = "WINWORD";
var process = Process.GetProcessesByName(processName);
try
{
foreach (var p in process)
{
p.Kill();
}
}
catch (Exception)
{
MessageBox.Show("请先关闭系统中的WINWORD.EXE进程!", "文件对比失败", MessageBoxButtons.OK);
return;
}
}
}
}