How to custom cast a list to a different type?

Working with Entity Framework and Razor pages, I've currently got a system going where I wrap my models inside of view models and display them to the screen, which I think is what I'm supposed to be doing in the MVVM architecture.

However, I'm having some trouble casting a list of type 'Foo' to type 'FooView', but casting a variable of type 'Foo' to type 'FooView' is fine. Here is the code:

Student Class

public class Student
{
    public Student()
    {
        Id = null;
        FirstName = "";
        Surname = "";
        Age = 0;
        DateOfBirth = new DateTime();
        Results = new HashSet<Result>();
    }

    public Student(string firstName, string surname, DateTime dateOfBirth)
    {
        Id = null;
        FirstName = firstName;
        Surname = surname;
        DateOfBirth = dateOfBirth;
        Results = new HashSet<Result>();
    }

    public int? Id { get; set; }

    public string FirstName { get; set; }

    public string Surname { get; set; }

    public int Age { get; private set; }

    // Implement backing field
    private DateTime _dateOfBirth;
    public DateTime DateOfBirth
    {
        get => _dateOfBirth;

        set
        {
            // Set Age when date of birth is provided
            _dateOfBirth = value;
            Age = (DateTime.Today.Year - this._dateOfBirth.Year);
            if (_dateOfBirth.Date > DateTime.Today.AddYears(-this.Age)) this.Age--;
        }
    }

    public HashSet<Result> Results { get; set; }

    public static implicit operator StudentView(Student student)
    {
        return new StudentView(student);
    }

}

Successfully casting student item to student view item on razor page WORKS

@foreach (var item in Model.Result)
{
    <tr>
        <td>
            @Html.DisplayFor(modelItem => ((StudentView)item.Student).FullName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Score)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Grade)
        </td>
        <td>
            <a asp-page="./Edit" asp-route-id="@item.Id">Edit</a> |
            <a asp-page="./Details" asp-route-id="@item.Id">Details</a> |
            <a asp-page="./Delete" asp-route-id="@item.Id">Delete</a>
        </td>
    </tr>
}

Trying to cast list to type 'Student View' FAILS

public async Task OnGetAsync()
{
    Student = await _context.Student.Cast<StudentView>().ToListAsync();
}

InvalidCastException: Unable to cast object of type 'StudentManagerDemoCore.Models.Student' to type 'StudentManagerDemoCore.ViewModels.StudentView'.

StudentManagerDemoCore.Pages.Teacher.ManageStudent.IndexModel.OnGetAsync() in Index.cshtml.cs

Student = await _context.Student.Cast<StudentView>().ToListAsync();

I have a feeling there is just something little I'm missing here, but I'm not sure what it is. The error implies there is an issue with my casting method, but that doesn't explain why it works sometimes.

Anyone know where I'm going wrong?