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Mastering C# for .NET Developers

Solution: Product Price Lookup

Explore how to implement a product price lookup system using a dictionary in C#. Learn to use indexer initialization, safely handle missing keys with TryGetValue, and track transaction totals efficiently. This lesson helps you apply collections and error handling principles to build robust lookup logic in checkout systems.

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C# 14.0
using Retail;
CheckoutSystem register = new();
register.ScanItem("SKU-1001"); 
register.ScanItem("SKU-9999"); 
register.ScanItem("SKU-1002"); 
Console.WriteLine($"\nFinal Total: ${register.Total}");
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