Notes

Certainly! Below are simplified examples of a model and controller for the Event Scheduling System in C# using ASP.NET Core. These examples cover basic functionality and assume the use of an in-memory storage system for simplicity.

### Model (Event.cs):

```csharp
public class Event
{
public int Id { get; set; }
public string Title { get; set; }
public DateTime Date { get; set; }
public TimeSpan Time { get; set; }
public string Location { get; set; }
public string Description { get; set; }
public bool IsGroupEvent { get; set; }
}
```

### Controller (EventsController.cs):

```csharp
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;

[ApiController]
[Route("api/events")]
public class EventsController : ControllerBase
{
private static List<Event> events = new List<Event>();

[HttpPost]
public IActionResult CreateEvent([FromBody] Event eventData)
{
eventData.Id = events.Count + 1;
events.Add(eventData);
return Ok(new { Message = "Event created successfully", EventId = eventData.Id });
}

[HttpPut("{id}")]
public IActionResult UpdateEvent(int id, [FromBody] Event updatedEventData)
{
Event existingEvent = events.Find(e => e.Id == id);

if (existingEvent == null)
{
return NotFound(new { Message = "Event not found" });
}

existingEvent.Title = updatedEventData.Title;
existingEvent.Date = updatedEventData.Date;
existingEvent.Time = updatedEventData.Time;
existingEvent.Location = updatedEventData.Location;
existingEvent.Description = updatedEventData.Description;

return Ok(new { Message = "Event updated successfully" });
}

[HttpDelete("{id}")]
public IActionResult DeleteEvent(int id)
{
Event existingEvent = events.Find(e => e.Id == id);

if (existingEvent == null)
{
return NotFound(new { Message = "Event not found" });
}

events.Remove(existingEvent);
return Ok(new { Message = "Event deleted successfully" });
}

[HttpGet("individual")]
public IActionResult GetIndividualEvents()
{
var individualEvents = events.Where(e => !e.IsGroupEvent);
return Ok(individualEvents);
}

[HttpGet("group")]
public IActionResult GetGroupEvents()
{
var groupEvents = events.Where(e => e.IsGroupEvent);
return Ok(groupEvents);
}
}
```

Please note that this example uses in-memory storage (`List<Event> events`) and doesn't include authentication logic. In a real-world scenario, you would likely use a database to store events and implement proper user authentication. Adjust the code according to your specific needs and database setup.