Web browser control issue:

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C#3.5

Hi ,i am using web browser control in my C# application . i try to open excel file in side the browser control but its open out side the application ..can you pls give your suggestion friends...urgent.

What I have tried:

public void OpenFile(string filename)
        {
            // Check the file exists
            if (!System.IO.File.Exists(filename)) throw new Exception();
            m_ExcelFileName = filename;
            // Load the workbook in the WebBrowser control
            //this.WebBrowserExcel.Navigate(filename, false);
            WebBrowserExcel.Navigate(filename, true);
        }