在VSTO中用，开发软件过程中提示如下语句出现错误：

xlsbook = xlsApp.Workbooks.Open("C:\Program Files (x86) \sldata.xlsx")

在这一句报警，
立即窗口出现提示：“在 System.Runtime. 中第一次偶然出现的“测试.exe”类型的异常”
网上搜了很多资料都没有解决问题，请论坛里的老师给帮忙看看，指点一下，谢谢！
具体代码和出错的项目文件附下：

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        '读取并释放资源文件
        Dim resources As System.Resources.ResourceManager = My.Resources.ResourceManager
        Dim res() As Byte = resources.GetObject("sldata")
        Dim myfile As New IO.FileStream("C:\Program Files (x86) \sldata.xlsx", IO.FileMode.OpenOrCreate)
        myfile.Write(res, 0, res.Length)
        myfile.Close()

        Dim xlsApp As Microsoft.Office.Interop.Excel.Application '声明对象变量
        Dim xlsbook As Microsoft.Office.Interop.Excel.Workbook
        Dim xlssheet As Microsoft.Office.Interop.Excel.Worksheet
        Dim C

        xlsApp = New Microsoft.Office.Interop.Excel.Application '实例化对象
        xlsbook = xlsApp.Workbooks.Open("C:\Program Files (x86) \sldata.xlsx") '打开EXCEL文件
        xlssheet = xlsbook.Worksheets("WO")
        C = xlssheet.Range("a:a").Find("B3SH10")
        xlsApp.Visible = False '使Excel隐藏不可见
        TextBox1.Text = C
    End Sub