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Generic Types

Explore how to implement generic types in C# to design versatile classes that handle multiple data types. Understand type parameters, default values, and how generics help avoid code duplication for better object-oriented programming.

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Introduction

Consider the following Holder class:

public class Holder
{
    public string[] Items { get; private set; }

    public Holder(int holderSize)
    {
        Items = new string[holderSize];
    }

    public override string ToString()
    {
        string result = "Items inside: ";

        foreach (var item in Items)
        {
            result = result + item + " ";
        }

        return result;
    }
}

It has the Items property, which is string type. The Holder class holds string items. What if we need a similar class that holds integers? The functionality is the same, but the type is different. ...