I am having trouble understanding what I need to do in order to pass the 2nd part of this challenge. Please help.

// Initializing Using Statements

using System;

// Establish Calculator Type

public class Calculator
{
    public double Result{get;set;}

    public Calculator(double Result)
            {
                Result = 0.0;
            }
    private double m_Total;

    public double Add(double value)
    {
        m_Total += value;
        return m_Total;
    }

    // Initialization Class To Establish Value of Calculator

//    public void Initialization()
//       {
//           Calculator calculator = new Calculator(1.1);
//        }
//    
//    public Calculator(double val)
//    {

      // var newCalc = 1.1;

      //Calculator(newCalc); 

      //return keyword must not be followed by any expression when method returns void
      //Compilation failed: 1 error(s), 0 warnings

//    }

//    public double Result{get;set;}

//    public void Add(double val)
//    {
       // throw new NotImplementedException();
//    }

    //Here, you want them to be "implemented".

    //For the purposes of testing, you want the functions 
    //implemented but empty. Don't throw the exceptions, 
    //that's essentially the same as not having the function at all.

    // Bummer! Assert.Equal() Failure, Expected: 1.1 (rounded from 1.1), Actual: 0 (rounded from 0)


// Initialize Calculator 


// Square function 
//public double Square(double num)
//{
//return num*num;
//}

// Add two doubles and returns the sum
//public double Add(double num1, double num2 )
//{
//return num1 + num2;
//}



// Multiply two integers and retuns the result
//public double Multiply(double num1, double num2 )
//{
//return num1 * num2;
//}

// Subtracts small number from big number
//public double Subtract(double num1, double num2 )
//{
//     if ( num1 > num2 )
//     {
//        return num1 - num2;
//     }
//     return num2 - num1;
//}

//public double Result(double num1)
//{

//}

//    CalculatorTests.cs(19,16): error CS1502: The best overloaded method match for `Xunit.Assert.Equal(double, double, System.Collections.Generic.IEqualityComparer)' has some invalid arguments
///usr/local/lib/ruby/gems/2.3.0/gems/challenge_proctor-0.0.0/lib/challenge_proctor/runners/includes/mono/xunit.assert.dll (Location of the symbol related to previous error)
//CalculatorTests.cs(19,39): error CS1503: Argument `#2' cannot convert `method group' expression to type `double'
//Compilation failed: 10 error(s), 0 warnings

//
}

using Xunit;

public class CalculatorTests
{
    [Fact]
    public void Initialization()
    {
        var expected = 1.1;
        var target = new Calculator(1.1);
        Assert.Equal(expected, target.Result, 1);
    }

    [Fact]
    public void BasicAdd()
    {
        var target = new Calculator(1.1);
        target.Add(2.2);
        var expected = 3.3;
        Assert.Equal(expected, target.Result, 1);
    }
}