Execute excel as another process

     
  
void ExecuExcelAsAnotherProcess()
{
	string excelProcessPath = "";
	string fileName = @"C:\Users\Administrator\Downloads\Test.xlsx_";
	try
	{
		this.Cursor = Cursors.WaitCursor;

		excelProcessPath = GetExcelProcessPath();

		string cmd = string.Format("\"{0}\" /x \"{1}\"", excelProcessPath, fileName);

		System.Diagnostics.ProcessStartInfo psInfo = new System.Diagnostics.ProcessStartInfo(cmd);
		psInfo.CreateNoWindow = false;
		psInfo.UseShellExecute = false;
		using (System.Diagnostics.Process ps = System.Diagnostics.Process.Start(psInfo))
		{
			ps.EnableRaisingEvents = true;
			ps.WaitForExit();
		}
	}
	finally
	{
		this.Cursor = Cursors.Default;
	}
}

string GetExcelProcessPath()
{
	dynamic app = null;
	try
	{
		Type excelType = Type.GetTypeFromProgID("Excel.Application");
		app = Activator.CreateInstance(excelType);
		app.Visible = true;
		app.DisplayAlerts = true;

		return Path.Combine(app.Path, "excel.exe");
	}
	finally
	{
		if (app != null)
		{
			app.Quit();
		}
		NAR(app);
	}

}

void NAR(object obj)
{
	try
	{
		if (obj != null)
		{
			System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
		}
	}
	catch { }
	finally
	{
		obj = null;
	}
}