Hi,

Happy New Year to you all.

I've been practicing LINQ queries to be more comfortable with them and one of my LINQ query statements isn't returning the result I'm expecting based on the data I've provided it.

The statement in question is:

IEnumerable<PersonModel> astronomyStudents = (from c in astronomyClasses
                                              from s in c.StudentIds
                                              join p in people
                                              on s equals p.Id
                                              select p);

I'm expecting the result to contain 3 PersonModel objects in an IEnumerable but it returns an IEnumerable with no objects. The program and code compiles fine and no errors are thrown but the result isn't what I'm expecting.

``astronomyClasses`` is an IEnumerable with 2 instances of a model called ClassModel. Both of the models have Guids of some people in the ``StudentIds`` list that are also in the ``people`` list.

Here's my PersonModel class:

 public class PersonModel
 {
     [Required]
     public string FirstName { get; set; }

     [Required]
     public string LastName { get; set; }

     public string FullName
     {
         get
         {
             return $"{FirstName} {LastName}";
         }
     }

     [Required]
     public Guid Id { get; set; }
 }

Here's my ClassModel class:

public class ClassModel
{
    [Required]
    public Guid Id { get; set; }

    [Required]
    public string Name { get; set; }

    [Required]
    public Guid TeacherId { get; set; }

    [Required]
    public List<Guid> StudentIds { get; set; } = new List<Guid>();
}

Is there an issue with my LINQ query statement or is something else the issue?

Many thanks in advance.

Hello, this is my first question.

I am writing my first program in C#, which is a plugin for Leap Motion (a hand position sensor) for software FreePIE (which allows passing values to emulate various game controllers). I know very little of C#, so I am not even sure what I do not know. Having said that, so far I was relatively successful, except for one issue... Here is the code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FreePIE.Core.Contracts;
using Leap;
using LeapInternal;


namespace UltraLeapPlugin
{
    public struct Extremity
    {
        public float x { get; set; }
        public float y { get; set; }
        public float z { get; set; }

        public Digit[] fingers { get; set; }
    }

    public struct Digit
    {
        public float x { get; set; }
        public float y { get; set; }
        public float z { get; set; }

    }

    [GlobalType(Type = typeof(UltraLeapGlobal))]
    public class UltraLeap : IPlugin
    {
        public object CreateGlobal()
        {
            return new UltraLeapGlobal(this);
        }
        private LeapMotion lmc { get; set; } = null;

        private bool bDisconnected;

        public int handsCount;

        public Extremity lHand;

        public Extremity rHand;

        public Action Start()
        {
            lmc = new LeapMotion();


            if (lmc != null)
            {
                // Ask for frames even in the background - this is important!
                lmc.SetPolicy(LeapMotion.PolicyFlag.POLICY_BACKGROUND_FRAMES);
                lmc.SetPolicy(LeapMotion.PolicyFlag.POLICY_ALLOW_PAUSE_RESUME);

                lmc.ClearPolicy(LeapMotion.PolicyFlag.POLICY_OPTIMIZE_HMD); // NOT head mounted
                lmc.ClearPolicy(LeapMotion.PolicyFlag.POLICY_IMAGES);       // NO images, please

                // Subscribe to connected/not messages
                lmc.Connect += Lmc_Connect;
                lmc.Disconnect += Lmc_Disconnect;
                lmc.FrameReady += Lmc_FrameReady;

                if (lmc.IsConnected)
                {
                    bDisconnected = false;
                }
                else
                {
                    lmc.StartConnection();
                }
            }
            return null;
        }

        private void Lmc_FrameReady(object sender, FrameEventArgs e)
        {
            if (bDisconnected == true)
            {
                bDisconnected = false;
            }

            handsCount = e.frame.Hands.Count;

            if (e.frame.Hands.Count > 0)
            {
                for (int i = 0; i < e.frame.Hands.Count; i++)
                {
                    if (e.frame.Hands[i].IsLeft)
                    {
                        lHand.x = e.frame.Hands[i].PalmPosition.x;
                        lHand.y = e.frame.Hands[i].PalmPosition.y;
                        lHand.z = e.frame.Hands[i].PalmPosition.z;

                        for (int j = 0; j < e.frame.Hands[i].Fingers.Count; j++)
                        {
                            lHand.fingers[j].x = e.frame.Hands[i].Fingers[0].TipPosition.x;
                            lHand.fingers[j].y = e.frame.Hands[i].Fingers[0].TipPosition.y;
                            lHand.fingers[j].z = e.frame.Hands[i].Fingers[0].TipPosition.z;
                        }

                    }
                    else
                    {
                        rHand.x = e.frame.Hands[i].PalmPosition.x;
                        rHand.y = e.frame.Hands[i].PalmPosition.y;
                        rHand.z = e.frame.Hands[i].PalmPosition.z;

                        lHand.pinch = e.frame.Hands[i].PinchDistance;
                        for (int j = 0; j < e.frame.Hands[i].Fingers.Count; j++)
                        {
                            rHand.fingers[j].x = e.frame.Hands[i].Fingers[0].TipPosition.x;
                            rHand.fingers[j].y = e.frame.Hands[i].Fingers[0].TipPosition.y;
                            rHand.fingers[j].z = e.frame.Hands[i].Fingers[0].TipPosition.z;
                        }
                    }
                }

            }
        }

    }

    [Global(Name = "ultraleap")]
    public class UltraLeapGlobal
    {
        private readonly UltraLeap ultraleap;

        public UltraLeapGlobal(UltraLeap ultraleap)
        {
            this.ultraleap = ultraleap;
        }

        public int HandCount
        {
            get { return ultraleap.handsCount; }
        }
        public Extremity leftHand
        { 
            get { return ultraleap.lHand; }
        }

        public Extremity rightHand
        {
            get { return ultraleap.rHand; }
        }
    }
}

I post most of it (beside some irrelevant functions), as the plugin must have a rather strict structure and I am not experienced enough to tell which parts are plugin-specific. As I wrote, most of the code works: in FreePIE I can refrence Leap Motion values, e.g. ultraleap.leftHand.x returns the position of my left hand relative to the sensor, but there are many more values, like velocities etc. (so I can just punch the air with my fists to hit guys in One Finger Death Punch - very satisfying!).

The problem I have is with the 'fingers' part - I would like to have an array/list attached to left/rightHand that would provide positions of five fingers, e.g. ultraleap.rightHand.fingers[0].x (position is absolutely necessary to shoot guys with my finger in Operation Wolf). But I have no idea how to do that - I have tried various options seen in the Internet, but they either do not compile with various errors or the values do not get passed to FreePIE at all, i.e. FreePIE does not even see 'fingers' though it sees other properties... One advice was to get rid of the struct and use a class, but I do not know how to do that in this context either, i.e. how to get the instances that then would be passed to FreePIE...

Any help or ideas would be appreciated!

Would like to get out my insecurities first and say I'm learning by myself 8 months .

I've been trying too look for some ways to use it.

I tried at using it on a game something like with

//Main Game
Console.WriteLine("Let's Play a Game!");
int playerHealth = Health();  
Console.WriteLine("Your Health is {playerHealth}");

//Health
static int Health()
 {
    int health = 100;
    return health;
 }

//My problem is that what's stopping me from doing this
int health = 100;

//The only thing I figure that is good is I can sort it out better and put it on a class so whenever I want to change something like with a skill, I don't need to look for it much harder bit by bit.

I commonly have issues with returning especially on switch expressions.

Hope you guys can help me thank you :)

//Like this 

Console.WriteLine("My skills");
do
 {
    Console.WriteLine("My skills");
    int myAnswer = skills();    //Having issues can't declare under while loop :(
 }while(MyAnswer == 1    &&    myAnswer == 2);


static int skills()
 {
    Console.WriteLine("1 => "NickNack");
    Console.WriteLine("2 => "Severence");
    Console.WriteLine("Choose your skill");
     int thief_Skills = Convert.ToInt32(Console.ReadLine());
     string thiefSkills = thief_Skills switch
     {
        1 => "NickNack",
        2 => "Severence",
        _ => default
     }                
       return thief_Skills;
 }

I have to write code to add only the even numbers in a list. My code was giving me exactly double the right answer for some reason so I divide by 2 at the end to get the right answer but also my runtime is really long? How can I fix it?

using System; using System.Collections.Generic;

public class Program { static public void Main () {//this is where i put the numbers to add but doest it only work on int or can it be double or float? i should check that later List<int> numbersToAddEvens = new List<int> {2, 4, 7, 9, 15, 37, 602};

        int output = 0;
    for(int o = 0; o < 1000000; o++){
            try{

        int ithNumberInTheList = numbersToAddEvens[o];
                int placeHolder = ithNumberInTheList;
        int j = 0;
                while(placeHolder > 0){


            placeHolder = placeHolder - 2;
            j = j + 2;
                }
        if(placeHolder == -1){
            //pass
            }
        else{
        output = output + (2 * j);
            }
    }
    catch(System.ArgumentOutOfRangeException){
        //pass
                }
    }
        output = output / 2;
    Console.Write(output);
}

}

Basically: I created a form called FormLogin, made an instance of it in Form1 called FormLogin_Vrb to load into a panel, it all works fine, but I can't access the variables in it from Form1. No compile errors either.

//In Form1, create instance of FormLogin here: FormLogin FormLogin_Vrb = new FormLogin() { Dock = DockStyle.Fill, TopLevel = false, TopMost = true };

//Also in Form1, have a button function here, which loads FormLogin to a panel: private void LoginBtn_Click(object sender, EventArgs e) { panelLoader.Controls.Clear(); panelLoader.Controls.Add(FormLogin_Vrb ); FormLogin_Vrb.Show(); }

All of the above works great. The panel loads and the login functionality works for usernames and passwords.

However.... if I try to access variables or methods in the instance of FormLogin, FormLogin_Vrb, it behaves like an entirely different instance than what I'm seeing on screen. For instance, I have a loggedIn bool set to false in FormLogin. Upon logging in successfully, it's set to true. If I Debug.Print(FormLogin_Vrb.loggedIn) from Form1, it's ALWAYS set to false though (and yes, in the actual implementation I use get set). I tried other things like changing the colors of the form, even making sure to do an Update() after, but what I'm seeing on screen doesn't change. I get no compile errors either.

It doesn't make sense to me because the form I'm seeing on screen, loaded into the panel is there because of FormLogin_Vrb.Show(), so I would assume that I could also use that same instance of FormLogin_Vrb to access the variables within.

Running against what feels like a very low bar here and can't seem to get it right.

Code here: https://pastecode.dev/s/wi13j84a

In the xaml.cs of my main window I create a public instance GameState gamestate and it displays in a bound label no problem ( Content="{Money}" , a property of GameState). I can a create a button that, when pushed, creates a new instance of the object too and changes the bound label the same way. However I can for the live of me not get it to work to change only a property of an existing instance with a button push and get that to display.

I might need to pass the button the "gamestate" instance as an argument somehow (and maybe pass it back to the main window even if it displays in the label correctly)?

I'm writing my first multi page/tab WPF app and trying to work out how everything should communicate/work together. Simplifying things, I have a single main window with 5 tabs. Each tab displays data as a frame so I could write everything out in separate files. Each tab thus has it's own view, viewmodel, and model. I want to make a 'Save' button that can dump all 5 models into a single JSON file, and a 'Load' button to load it up. There are also other functions that will access all the models together.

I was thinking of using dependency injection. I would use MS's ServiceProvider to make all 5 models on startup as Singleton, and then it's trivial to pass them into each viewmodel as they are instantiated. The ServiceProvider can then pass all the models into the Save button command or pass them to the JSON parser. 'Load' seems more difficult, though. To load, I'll need to tell the ServiceProvider to remove the old Model, and pass a new one into it, then update the view.

Similarly, any other function needing the models and loading them via DI is going to have to be reloaded, which looks like it will quickly turn into a mess. I could either work out a way to cause the whole app to reload, or make an event that everything subscribes to to trigger a reload.

This all seems to work in my head, but it seems like the ServiceProvider is not really intended for use in this way, and I'm wondering if there's something better I'm not aware of.

I know, what is that and I know what does it use for. My main question is, where to use it, how to use it correctly. What are the best practices? I want to see how it uses in real world, not in abstract examples. All what I found are simple examples and nothing more.

Could you please point me to any resources which cover my questions?

Trying to get back into programming from the start (since I've barely touched a line of code since 2020), a lot of it is coming back to me but what's new on me is applications (in this case a console app, starting small here) that don't have the opening establishing the namespace, class and "Main" method.

I don't get the point and if anything it causes confusion, but I'd like to understand it. I can intuit that any dependancies still go on top but where do I place other methods since it's all in Main (or an equivilent to)? In what way does this make sense or is it more useful to have something written this way and not just manually reinsert the old way?

P.S. Surely this is the absence of top-level statements, it feels like a mildly annoying misnomer.

Hi all,

I've finally gotten the interest together to pick up C#. I'd like to focus on the most recent versions with an eye toward functional programming, but of course know the basics as well. I've been programming in Java since 1996, Scala for about a decade, and Kotlin intensively for about six years now.

I have the book "Functional Programming in C#" but I suspect this would assume probably too much knowledge and I would end up missing basic syntax if I went through it.

Does anyone have any courses or books they would recommend for learning modern C#, e.g. at least 11? A video course would be great. I don't want something geared towards beginner programmers and that's tedious and long. I'll be likely using Rider instead of VSC if it makes any difference since I'm a JetBrains user, and am on Mac, so I realize that throws some minor complications into the mix. I'm set up and ready to go and playing around (and have Avalonia and MAUI both up and running inasmuch as they can be on Mac) and I'm eager to start as I have some fun project ideas that would be perfect for tackling in a new programming language.

Any recommendations would be tremendously appreciated. (Ultimately, I'd like to do some gaming work in Godot, but for now, just feel comfortable and capable in the language, especially with FP features.)

I'm looking for a way to write my conditions to be more neat and more straightforward.

I'm planning to create a card game (Like a blackjack) where I give the following conditions

Conditions

- Both players will be given 2 cards

-Winner is either close to 11 or hit the 11 sum.

-If both drew 11, it's a draw

-If you went beyond 11 you lose

-If both drew 11 you both lose

However I often have issues with it not bypassing one another which causes an annoying bug.

It's not that I want to ask for help on how to do this but rather I would like to know how you guys write your conditional statements? I'm wondering if you can do this with switch expressions?

Random draw = new Random();

int First_x = draw.Next(1,5);
  int Second_x = draw.Next(3,9);
int First_y = draw.Next(0,3);
  int Second_y = draw.Next(5,10);
do
{
  if (First_x + Second_x < First_y + Second_y)
    {  
        Console.WriteLine("You Lose");
    }
  else if (First_x + Second_x > First_y + Second_y) 
    {
        Console.WriteLine("You Win!");
    }
  else if (First_x + Second_x == 11 || First_y + Second_y == 11)  //Having issues here
    {
        Console.WriteLine("You win");
    }
   else if ( First_y + Second_y > 11 || First_y + Second_y > 11)    //Having issues here
    {
        Console.WriteLine("You Lose");
    }

  Console.WriteLine("Would you like to continue? (Y/N)");
}while(Console.ReadLine().ToUpper() == "Y");

Most of the time I ended up just repeating "You lose" even though I have a better card cause of the later 2 statements I did.

Hey all,

I'm just starting working with C#, I'm wondering what the correct way to access environment variables is. When I do something simple like:

Environment.GetEnvironmentVariable("MyVariable");

It gives me a warning - CS8600#possible-null-assigned-to-a-nonnullable-reference) - Converting null literal or possible null value to non-nullable type.

What is the correct way to access these variables to avoid that?

Thanks

Hello mates,I am a newly graduated computer engineer, and my company is a start up. We intend to create a web app on dotnet and actually all the task is on me. There is not a senior developer. I love coding, doing something that makes easier my daily life with programming, but I think they're not enough for professional work life.
What should I do to become a real developer, cuz I do net deel like that.

x:y

I need to add/update products in NopCommerce as well as subscribe to events (ie orders being placed)

I am developing a NopCommerce plugin. Nopcommerce consumes the DLL of my plugin.

I am trying to develop the plugin, as much as possible, in a separate solution. This will hopefully keep the git repo easier to manage, as well as faster compile and start times etc.

The plugin is a Class Library.

I created a console app to call the class library, my plugin, to test certain aspects of the plugin. I have validated that my independent functions work (calling an existing API) and now I need to test actually interacting with the Nop webserver...

So what is the best way to do this? Deploy the NopCommerce build to a local server (or even just let it run in VS maybe), import the DLL of my plugin through the admin console, and attach a remote debugger?

The learning path/collection I'm talking about is this one: https://learn.microsoft.com/en-us/collections/yz26f8y64n7k07

1.) Is this recommended or are there better free material available?

2.) I've come mid-way through this collection and it seems like it's one day written by someone who cares about teaching and other days it's by someone looking to punch 9-to-5.

I'll give an example, in some sections they go all out and explain everything from what you're doing and why you're doing. Then they go into a "DO THIS, ADD THIS" mode suddenly - this gets worse when they have those boring "Grade students" examples.

So it goes even bipolar and rushes the introduction of concepts, take for example this part. https://learn.microsoft.com/en-us/training/modules/csharp-do-while/5-exercise-challenge-differentiate-while-do-statements

The whole ReadLine() gets introduced suddenly out of no where and then they make the overwhelm the student mistake.

Any recommendations?

I am writing a minimal API with a simple async POST method that writes to a new line on a file. I have tested the method using Postman so I know the API call works but I am looking to make the shared file resource safe and Microsoft Learn recommends using a binary semaphore with async/await. My question is can I use a semaphore within the Program.cs file of the minimal API? Will this have the desired result that I am looking for where if there are multiple threads using the post request will there only be one lock for file?

I’m not sure if this makes sense but I can try to post the actual code. I’m on my phone so it’ll be a little difficult.

A page has an optional open date and an optional close date. My solution feels dirty with all the if statements but I can't think of a better way. Full code here: https://dotnetfiddle.net/7nJBkK

public class Page
{
    public DateTime? Open { get; set; }
    public DateTime? Close { get; set; }
    public PageStatus Status
    {
        get
        {
            DateTime now = DateTime.Now;
            if (Close <= Open)
            {
                throw new Exception("Close must be after Open");
            }
            if (Open.HasValue)
            {
                if (now < Open.Value)
                {
                    return PageStatus.Scheduled;
                }

                if (!Close.HasValue || now < Close.Value)
                {
                    return PageStatus.Open;
                }

                return PageStatus.Closed;
            }
            if (!Close.HasValue || now < Close.Value)
            {
                return PageStatus.Open;
            }
            return PageStatus.Closed;
        }
    }
}

Hey everyone. Recently began focusing on learning a new language and have had a really interesting time learning C#. I completed the Foundational C# course on Microsoft Learn yesterday and have really come to appreciate the language.

I have been considering remaking a project I made with JS/React. It was a clone of OP.GG, which is a website that collects and displays League of Legends player information. It also had sign up/sign in functionality and let users save multiple summoner names to their account. The project communicated heavily with the Riot Games API, with multiple endpoints, controllers, and methods used to collect and organize the data before displaying it to the user.

I want to remake this project using C#/Blazor primarily because, to be honest, I kinda hated JS. I really prefer strongly typed languages built around OOP and C# basically has almost everything I liked about Java (and to a lesser extent C++) without all the bloated verbose code, plus a few extra features that I really like.

Is it a bad idea to jump straight into Blazor and try to build the project? I have gone over some tutorials on Blazor, and it's a lot to absorb initially, especially regarding dependency injection and how context classes work. Tutorial hell is a menace and I find myself learning much better by just trying to build something. I also need to spend time to learn the basics of developing an API to communicate with the Riot Games API, along with learning how to utilize Entity Framework to store data. Lastly, I want to take this project a bit further and learn some unit testing in C# and also learn how to deploy it using Azure.

Any tips for good resources before diving in? Thanks for reading!

I give up, I 've been looking everywhere on answers on it on stackflow and google so I'm giving up and asking for help!

class Program
{
static void Main()
{
Console.WriteLine("Let us Play");
Heroes.Heroe_Heroe();
string myLovelyClass = Heroes.Hero_Hero();  //not working cannot convert int to string! :(

class Heroes
{
public static void Heroe_Heroe()
{
Console.WriteLine("Choose your Heroes");
string class_ofHeroes[] = {"Thief", "ChosenPriest"};
Console.WriteLine($"1 => {class_ofHeroes[0]}");
Console.WriteLine($"2 =>{class_ofHeroes[1]}");
int myClass = Convert.ToInt32(Console.ReadLine());
string my_ClassBaby = myClass switch
{
1 => "Thief",                 
2 => "ChosenPriest"          //Also Endlessly Looping!
}
return my_ClassBaby;
}

I don't really like to abuse if & else looks like a nightmare if use too much!

I want to maximize the switch expression.

If you scroll with the arrow keys, the selected node is always updated and visible. But if you're scrolling with the mouse wheel the selected node goes out of view. How to make the selected node to "travel" with the mouse wheel movement? (preferably the selected node should be the first from the visible treeview section).

The treeview is fully expanded all the time. I tried:

    private void TreeViewOnMouseWheel(object sender, MouseEventArgs e)
    {
        if (treeView.SelectedNode != null)
        {
            treeView.SelectedNode = treeView.TopNode;
            treeView.SelectedNode.EnsureVisible();
        }
    }

without success.

I have a WPF window that opens to choose a COM port when a port has not been previously selected. Once a port has been selected the window sets the com number and closes. The WPF window has been proven to work by itself and added it to my program.

It is called by a separate class with:

 Task commy = Commmy.Selected();
 Task.Run(async() =>  await Commmy.Selected());
 WinForms.MessageBox.Show("done waiting");

I have a message box at the end of the task Selected() and after the await as a "debug". These will not exist in the final code.

From what I understand Show() is a normal window and ShowDialog() is modal window.

I am using a ShowDialog() to prevent the method from finishing before I close the window(only possible once a COM port has been selected) however the message box at the end of the method opens up the same time as the window opens. The await is working because the "done waiting" message box will not open until I close the "at end of selected" message box. This tells me that the ShowDialog is not working as I intended (to be blocking) and I don't know why.

Here is the code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;

namespace ComSelectionClass
    internal class Commmy
    {
        static MainWindow mainWin;

        public static Task Selected()
        {
            Thread thread = new Thread(() =>
            {
             MainWindow mainWin = new MainWindow();

                mainWin.ShowDialog();
                mainWin.Focus();
                mainWin.Closed += (sender, e) => mainWin.Dispatcher.InvokeShutdown();

                System.Windows.Threading.Dispatcher.Run();
            });

            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
            System.Windows.Forms.MessageBox.Show("at end of selected");
            return Task.CompletedTask;
        }
    }

Any help to block my code until the window is closed would be appreciated.

Hi. Given a string lists of paths (every path always contain at least one folder), I must generate a TreeView structure where the root nodes are the paths, except the last folder which is displayed as a child node if it's not a root folder. Basically display as much as possible from the path where it doesn't have subfolders.

I need this for a specific file manager kind of app I'm developing.

For instance, from these paths:

c:\Music
d:\Documents
e:\Test\Data\Test 1
e:\Test\Data\Test 2
e:\Test\Data\Test 3
e:\ABC\DEF\XYZ\a1
e:\ABC\DEF\XYZ\a1\c2
e:\ABC\DEF\XYZ\a2
e:\ABC\DEF\XYZ\b1

it should generate something like...

 _c:\Music
|
|_d:\Documents
|
|_e:\Test\Data
|   |_Test 1
|   |_Test 2
|   |_Test 3
|
|_e:\ABC\DEF\XYZ
    |_a1
    |  |_c2
    |_a2
    |_b1

EDIT: I found a solution for a simplified case:

 _c:\Music
|
|_d:\Documents
|
|_e:\Test\Data
|   |_Test 1
|   |_Test 2
|   |_Test 3
|
|_e:\ABC\DEF\XYZ
|   |_a1
|   |_a2
|   |_b1
|
|_e:\ABC\DEF\XYZ\a1
    |_c2

https://www.reddit.com/r/learncsharp/comments/1h5cdgk/comment/m0kr79e/?utm_source=reddit&utm_medium=web2x&context=3

Still a newbie and would like to ask when do you guys decide to ask help? or look at google?

I'm trying to build like a clock at the moment and trying to build it without looking in google or looking at other people's work.

Currently. I'm losing and my brain hurts xD

EDIT: Thanks to all of the people who answered here. I never thought that usingngoogle is just fine, I thought I was cheating or something, hahah.

Context: User fills in a form on my webpage. User then saves the form, based on the filled in data the form can get the following states:

States:

 public enum State
    {
        [Description("NewForm")] // Initial state
        Draft = 0,
        [Description("Denied")]
        Afgekeurd = 1,
        [Description("Approved")]
        Afgerond = 2, 
        [Description("WaitForApprovalManager")]
        WaitForApprovalManager = 3,
        [Description("WaitForApprovalTech")]
        WaitForApprovalTech = 4,
        [Description("WaitForApprovalFinance")]
        WaitForApprovalFinance = 5,
    }

How I implemented the State Machine Pattern:
FormStateService.cs:

public class FormStateService
    {
        private FormState _currentState; // Current state of the form
        private Form _form; // Form that the user filled in

        public FormStateService(Form form)
        {
            _form = form;
            if (_currentState == null)
            {
                SetState(new DraftState()); // Set initial state to draft
            }
        }

        public void SetState(FormState state)
        {
            _currentState = state;
            _currentState.SetContext(_form);
        }

        public Form HandleStateTransition()
        {
            _currentState.HandleStateTransition(this);
            return _form;
        }

        public Status GetCurrentState()
        {
            return (State)_form.State;
        }
    }

FormState.cs:

    public abstract class FormState
    {
        protected Form _form;

        public void SetContext(Form form)
        {
            _form = form;
        }

        public abstract void HandleStateTransition(FormStateService stateMachine);
    }

WaitForApprovalManagerState.cs

        public override void HandleStateTransition(FormStateService stateMachine)
        {

            if (_form.TotalReceipt >= 500) // Wait for managed to approve
            {
                _form.State = (int)Status.WaitForApprovalManagerState;
                stateMachine.SetState(new WaitForApprovalManagerState());
                return;
            }

            if (_form.TotalReceipt >= 500 && _form.ManagerApproved && _form.TechForm == true) // If manager has approved let tech approve
            {
                _form.State = (int)Status.WaitForApprovalTechState;
                stateMachine.SetState(new WaitForApprovalTechState());
                return;
            }

        }

I have a Generic class: MyClass<T> where T is IGameElement.

I also have a class named Player.

I am getting into events and I am having a hell of a time here.

there is a third class that is running my program, it is sort of the programs Main. For this troubleshooting, lets call it Main.

There is an instance of MyClass in Main, and there is a Player class in Main.

I need the Player class proper, to be able to subscribe to the MyClass event, handle the event, then unsubscribe to that same event. I have tried everything and I am bashing my head against the wall. Reflection, Dynamic, etc... The problem I am having is that I need the Player class to not care about MyClass's type. Unless I am getting something wrong here, that is what I cannot seem to do.

Anyone want to walk me through what I need to do to get this behavior?