✅ ✅ C# Academy Calculator Project Challenge -- Counting Times Used

JsonWriter writer;
public Calculator()
{
    StreamWriter logFile = File.CreateText("calculatorlog.json");
    logFile.AutoFlush = true;writer = new JsonTextWriter(logFile);
    writer.Formatting = Formatting.Indented;
    writer.WriteStartObject();
    writer.WritePropertyName("Usage");
    writer.WriteValue(0);
    writer.WritePropertyName("Operations");
    writer.WriteStartArray();
}
public double DoOperation(double num1, double num2, string op)
{
    double result = double.NaN;
    writer.WriteStartObject();
    writer.WritePropertyName("Operand1");
    writer.WriteValue(num1);
    writer.WritePropertyName("Operand2");
    writer.WriteValue(num2);
    writer.WritePropertyName("Operation");
    
    switch (op)
    {
        case "a":
            result = num1 + num2;
            writer.WriteValue("Add");
            break;
        case "s":
            result = num1 - num2;
            writer.WriteValue("Subtract");
            break;
        case "m":
            result = num1 * num2;
            writer.WriteValue("Multiply");
            break;
        case "d":
            if (num2 != 0)
            {
                result = num1 / num2;
            }
            writer.WriteValue("Divide");
            break;
        
        default:
            break;
    }
    writer.WritePropertyName("Result");
    writer.WriteValue(result);
    writer.WriteEndObject();
    return result;
}

public void Finish()
{
    writer.WriteEndArray();
    writer.WriteEndObject();
    writer.Close();
}

try
{
    result = calculator.DoOperation(cleanNum1, cleanNum2, op); 
    if (double.IsNaN(result))
    {
        Console.WriteLine("This operation will result in a mathematical error.\n");
    }
    else
    {
        Console.WriteLine("Your result: {0:0.##}\n", result);
    }
}
catch (Exception e)
{
    Console.WriteLine("Oh no! An exception occurred trying to do the math.\n - Details: " + e.Message);
}

using System.Text.Json;

public static void UpdateCount()
{
    string file = "calculatorlog.json";
    var jsonObj = JsonSerializer.Deserialize(file);
    jsonObj["Usage"]++;
    var jsonObj2 = JsonSerializer.Serialize(jsonObj, file);
}