The design of the calculator class should be in this:

this is what I have so far am really confused?:

public class Calculator { private decimal currentValue; public Calculator() { } public Calculator(decimal currentValue) { this.CurrentValue = currentValue; } public decimal CurrnetValue { get { return currentValue; } set { currentValue = value; } } public decimal Add(decimal operand1, decimal operand2) { return operand1 + operand2; } public decimal Subtract(decimal operand1, decimal operand2) { return operand1 - operand2; } public decimal Multiply(decimal operand1, decimal operand2) { return operand1 * operand2; } public decimal Divide(decimal operand1, decimal operand2) { return operand1 / operand2; } }