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<%@ Page Language="C#" Trace="True"  %>
<script runat="server">

// Lowercase "base" is a keyword
public int Factorial (int Base){
    if(Base <=0){
        throw(new Exception("Invalid value for Factorial"));
        return 0;
    }
    /*
    we forget our exit condition here... (and c# allows multiline comments!!!)
    
    else if(Base== 1){
        Trace.Write ("Factorial", "Exit condition met, returning.");
        return Base;
    }
    */
    else{
        Trace.Write("Factorial","Recursing, new value: " + (Base-1));
        try{
            return (Base * Factorial(Base-1));
        }
        catch(Exception E){
            Trace.Warn ("Factorial: " + Base, "Error in Factorial call.", E);
            return 0;
        }
    }
}
</script>
<html>
<head>
</head>
<body>
<%
    try{
        Response.Write(Factorial(-1) + "<br>");
    }
    catch(Exception E){
        Trace.Warn ("Main: -1", "Error calling Factorial", E);
    }
    try{
        Response.Write(Factorial(5) + "<br>");
    }
    catch(Exception E){
        Trace.Warn ("Main: 5", "Error calling Factorial", E);
    }
%>
</body>
</html>