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Creating a Basic Calculator in C# Using Functions Here's a C# program that implements a basic calculator using functions to handle different arithmetic operations: using System; namespace Calculator {     class Program     {         static void Main(string[] args)         {             double num1, num2, result;             char op;             Console.Write("Enter first number: ");             num1 = Convert.ToDouble(Console.ReadLine());             Console.Write("Enter second number: ");             num2 = Convert.ToDouble(Console.ReadLine());             Console.Write("Enter an operator (+, -, *, /): ");             op = Convert.ToChar(Console.ReadLine());         ...