Generics keep your code type-safe, because C# checks that you use the right types.
🚫 Without Generics
Using object is flexible, but risky:
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ArrayList items = new ArrayList();
items.Add("hello");
items.Add(123); // Oops different type!
string s = (string)items[1]; // Error at runtime!
✅ With Generics
With generics, C# checks types for you:
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List<string> words = new List<string>();
words.Add("hello");
// words.Add(123); // Compile-time error!
🛡️ Why it Matters
- Fewer runtime errors (bugs pop up before running the program).
- Code is easier to read and maintain.
💡 Try It!
Create a List<int> and add numbers. Try to add a string… what happens?
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List<int> numbers = new List<int>();
numbers.Add(1);
// numbers.Add("two"); // Compile error
Next: Exception handling!
