Understanding the Difference Between ‘String’ and ‘string’ in C#
<p>C# is a strongly-typed programming language, which means that knowing your data types is essential for writing effective C# code. In C#, one of the most frequently used data types is the string type, which can be declared as either <code>String</code> or <code>string</code>. This can lead to some confusion: What's the difference between <code>String</code> and <code>string</code>, and when should you use each?</p>
<p>In this post, we’ll delve into these two types to understand their similarities and differences and explore some scenarios where you might prefer one over the other.</p>
<p>The <code>String</code> class is a part of the System namespace (<code>System.String</code>). It is a class that provides various methods for string manipulations like <code>Substring</code>, <code>Concat</code>, <code>Replace</code>, etc. You can use it like this:</p>
<pre>
using System;
namespace StringExample
{
class Program
{
static void Main(string[] args)
{
String name = "Mabrouk";
Console.WriteLine(name.ToLower()); // "mabrouk"
}
}
}</pre>
<h2><code>string</code></h2>
<p>On the other hand, <code>string</code> is an alias for <code>String</code> in the C# language. It's a more readable way to declare a string variable and is syntactically simpler. <code>string</code> is simply shorthand for <code>System.String</code>.</p>
<pre>
namespace StringExample
{
class Program
{
static void Main(string[] args)
{
string name = "John";
Console.WriteLine(name.ToLower()); // "john"
}
}
}</pre>
<h1>The Similarities</h1>
<ol>
<li><strong>Interchangeable</strong>: You can use <code>String</code> and <code>string</code> interchangeably without any issues</li>
</ol>
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