What are the differences between List<T> and an array in C# Arrays

Hello Kiran,

Here are key differences between both,

1. Size        
   • Arrays have a fixed size
   • Lists resize automatically.
2. Namespace        
   • Arrays are built-in
   • Lists need System.Collections.Generic.
3. Performance        
   • Arrays are slightly faster due to no resizing overhead.
4. Features        
   • Arrays offer basic functionality
   • Lists provide rich helper methods.
5. Memory        
   • Arrays allocate memory upfront
   • Lists grow as needed.
6. Initialization        
   • Arrays use new T[size]
   • Lists use collection initializers.
7. Use Case        
   • Arrays are ideal for fixed data
   • Lists suit dynamic or unknown sizes.
8. LINQ Support        
   • Arrays support LINQ with conversion
   • Lists support LINQ directly.

In C#, both List and arrays are used to store collections of elements,

Array: Fixed size. Once created, its size cannot be changed.

int[] numbers = new int[5]; // Fixed size

List: Dynamic size. It can grow or shrink as needed using methods like Add(), Remove(), etc.

List numbers = new List(); // Dynamic size