How to create a log file using enterprise library without enterprise library tool in MVC 5.

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MVC5

Hi,
Can any one please tell me how to record all errors in a log file using enterprise library 5 in a mvc 5 application?
In web.config i have changed the logCategory="Trace" then tracingenabled="True" and so on.
In global.asax.cs,
protected void Application_Error(object sender, EventArgs e)
{
//uncomment in order to bypass logging when running locally.
//if (!Request.IsLocal)
//{
Exception ex = Server.GetLastError();
if (ex is HttpUnhandledException && ex.InnerException != null)
{
ex = ex.InnerException;
}

if (ex != null)
{

Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.
ExceptionPolicy.HandleException(ex, "General Policy");
Server.ClearError();

Response.Redirect("~/Utility/ErrorPage.htm");
}
}
So here i want to write the exception caught to a log file.
Thanks in Advance!!!