<TelerikNotification @ref="@NotificationReference" Class="MyTelerikNotification" VerticalPosition=NotificationVerticalPosition.Top HorizontalPosition=NotificationHorizontalPosition.Center></TelerikNotification>
<h3>@FlightTitle</h3>
<ul>
    @foreach (var question in ThisFlightForm.Form.TrueFalseQuestions)
    {
        <FormQuestionTrueFalse thisFormItem=question />
    }
</ul>
<div>
    <button @onclick="OnClick_BtnSubmit" class="btn">Submit</button>
    <button @onclick="OnClick_BtnCancel" class="btn">Cancel</button>
</div>

public TelerikNotification NotificationReference { get; set; } = new();

private void OnClick_BtnSubmit()
    {
        var canSubmit = _preSubChecks.CanFormBeSubmitted(ThisFlightForm);
        if (canSubmit.ChecksPassed)
        {
            //this does not work at all, despite being called
            ShowToasts($"Unable to submit form - {canSubmit.ErrorMsg}", ThemeConstants.Notification.ThemeColor.Error);
            ShowToasts("Submitting Form", ThemeConstants.Notification.ThemeColor.Info);
            ShowToasts("Success!", ThemeConstants.Notification.ThemeColor.Success);
        }
        else
        {   //this works fine
            ShowToasts($"Unable to submit form - {canSubmit.ErrorMsg}", ThemeConstants.Notification.ThemeColor.Error);
        }

    }

private void ShowToasts(string msg, string toastType)
    {
        var tmpNm = new NotificationModel()
            {
                Text = msg,
                ThemeColor = toastType,                
            };
        NotificationReference.Show(tmpNm);
        Console.WriteLine(JsonConvert.SerializeObject(tmpNm));
    }

{"ThemeColor":"error","Closable":true,"CloseAfter":5000,"ShowIcon":true,"Icon":null,"Text":"Unable to submit form - "}
{"ThemeColor":"info","Closable":true,"CloseAfter":5000,"ShowIcon":true,"Icon":null,"Text":"Submitting Form"}
{"ThemeColor":"success","Closable":true,"CloseAfter":5000,"ShowIcon":true,"Icon":null,"Text":"Success!"}

{"ThemeColor":"error","Closable":true,"CloseAfter":5000,"ShowIcon":true,"Icon":null,"Text":"Unable to submit form - At least one question was not answered"}

<p>Value1 : @Person.Value1</p>
<p>Value2 : @Person.Value2</p>

<TelerikForm Model="@Person">
    <FormValidation>
        <DataAnnotationsValidator></DataAnnotationsValidator>
    </FormValidation>
    <FormItems>
        <FormItem Field="@(nameof(Person.Value1))">
            <Template>
                <label class="k-label k-form-label">Value 1</label>
                <div class="k-form-field-wrap">

                    <TelerikNumericTextBox Decimals="2"
                                           Format="C"
                                           Min="0"
                                           Step="0.01m"
                                           ValueChanged="@((decimal? v) => Value1ChangedHandler(v))"
                                           Value="@Person.Value1"
                                           ValueExpression="@(() => Person.Value1)">
                    </TelerikNumericTextBox>
                    <TelerikValidationMessage For="@(() => Person.Value1)"></TelerikValidationMessage>
                </div>
            </Template>
        </FormItem>

        <FormItem Field="@(nameof(Person.Value2))">
        </FormItem>
    </FormItems>
</TelerikForm>

public partial class Example
{
    private Input Person { get; set; } = new();

    protected override void OnInitialized()
    {
        Person = new()
        {
            Value1 = 1000,
            Value2 = 2000,
        };

        base.OnInitialized();
    }

    private void Value1ChangedHandler(decimal? newValue1)
    {
        this.Person.Value1 = newValue1;
        this.Person.Value2 = newValue1 * 2; // We tried to add StateHasChanged(), but not working as well
    }
}

public class Input
{
    public decimal? Value1 { get; set; } 
    public decimal? Value2 { get; set; }
}