Rectángulo V3 - Ejercicio De Programacion C# Sharp

using System;  // Import the System namespace for basic functionality
using System.Linq;  // Import the LINQ namespace for Enumerable.Repeat

class Program  // Define the main class
{
    static void Main()  // The entry point of the program
    {
        // Ask the user for their name and size of the rectangle
        Console.Write("Enter your name: ");
        string name = Console.ReadLine();  // Read the user's input as a string

        Console.Write("Enter size (minimum 2): ");
        int size;

        // Validate the size input
        while (!int.TryParse(Console.ReadLine(), out size) || size < 2)
        {
            Console.Write("Please enter a valid size (minimum 2): ");
        }

        // Print the top and bottom edges of the rectangle
        string topBottom = string.Concat(Enumerable.Repeat(name, size));
        Console.WriteLine(topBottom);  // Print the top edge

        // Print the middle rows of the rectangle
        for (int i = 1; i < size - 1; i++)
        {
            // Print the left part, followed by spaces, and then the right part
            Console.Write(name);  // Print the first part of the name
            Console.Write(new string(' ', (size - 2) * name.Length));  // Print spaces
            Console.WriteLine(name);  // Print the last part of the name
        }

        // Print the bottom edge of the rectangle (same as the top)
        if (size > 1)  // To prevent repeating the top if the size is 1
        {
            Console.WriteLine(topBottom);  // Print the bottom edge
        }
    }
}

 Salida

Enter your name: John
Enter size (minimum 2): 5
JohnJohnJohnJohnJohn
John            John
John            John
John            John
JohnJohnJohnJohnJohn