Pastable version of HELP: How to use a try-catch on a switch statement

<pre class='prettyprint' language='cs'>decimal total = 0.00m;

char Base;

string bill = &quot;\n\n&quot;;

Console.WriteLine(&quot;**************&quot;);
            Console.WriteLine(&quot;My Pizza&quot;);

Console.WriteLine(&quot;\nTraditional or 'thin and crispy' base? &quot;);
            Console.WriteLine(&quot;A = Traditional&quot;);
            Console.WriteLine(&quot;B = thin and crispy&quot;);

Base = char.Parse(((Console.ReadLine()).ToLower()).Substring(0, 1));
                switch (Base)
                {

case 'a':
                        bill += &quot;\n\t-Traditional Base selected = FREE&quot;;
                        break;

case 'b':
                        bill += &quot;\n\t-thin and crispy Base selected = FREE&quot;;
                        break;

}
    
                Console.WriteLine(&quot;\n\n\t\t\t=====Bill=====&quot;);
                Console.WriteLine(bill);

Console.WriteLine(&quot;\n\t\ttotal \t\t = Â£&quot; + total);
                Console.ReadLine();
            }
        }
    }</pre>
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Pastable version of HELP: How to use a try-catch on a switch statement