I’m writing a “Course” application in ASP.NET Core MVC. When I try to apply any course, it returns no value for SelectedCourse. I tried

<input id "mvc1" type="radio" asp-for="SelectedCourse"value="ASP.NET Core MVC" checked="true" />

but it didn’t work.

Apply.cshtml:

<div>
    <fieldset></fieldset>

    <legend>Select One(1) Course</legend>
    <p>
        <input id "mvc1" type="radio" asp-for="SelectedCourse"value="ASP.NET Core MVC" checked="true" />
        <label>ASP.NET Core MVC</label>
    </p>
    <p>
        <input id "mvc2" type="radio" asp-for="SelectedCourse" value="Blazor" />
        <label>Blazor</label>
    </p>
    <p>
        <input id "mvc3" type="radio" asp-for="SelectedCourse"value="API" />
        <label>Api</label>
    </p>
</div>

Repository.cs:

namespace BTK_Akademi.Models
{
    public static class Repository
    {
        private static List<Candidate> applications = new();
        //Listenin dışardan düzenlenmemesi lazım yani readonly olacak 
        public static IEnumerable<Candidate> Applications => applications;
        
        public static void Add(Candidate candidate)
        {
            applications.Add(candidate); 
        }
    }
}