✅ Two-way binding class object Blazor Server

// Person.cs

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

// Index.razor

@page "/"

<h1>Hello, @_person.Name! You are @_person.Age years old.</h1>

<PersonForm @bind-Value="_person" />
<button @onclick="StateHasChanged">Update</button>

@code {
    private Person _person = new() { Name = "Joe", Age = 40 };
}

// PersonForm.razor

<EditForm Model="BoundValue">
    <InputNumber @bind-Value="BoundValue.Age" />
    <InputText @bind-Value="BoundValue.Name" />
</EditForm>

@code {
    [Parameter]
    public Person Value { get; set; }

    [Parameter]
    public EventCallback<Person> ValueChanged { get; set; }

    private Person BoundValue
    {
        get => Value;
        set => ValueChaged.InvokeAsync(value);
    }
}