Solution Review: Square Numbers and Return their Sum

// Square Sum
class SumOfSquares {
  // Method to square the sum of three numbers
  public double SquaresSum(double num1, double num2, double num3) {
    double sum = 0;
    double square1 = 0;
    double square2 = 0;
    double square3 = 0;
    square1 = num1 * num1;
    square2 = num2 * num2;
    square3 = num3 * num3;
    sum = square1 + square2 + square3;
    return sum;
  }
  
}
class Demo {
  public static void Main(string[] args) {
    SumOfSquares sum = new SumOfSquares();
    Console.WriteLine(sum.SquaresSum(2, 3, 4));
  }
}