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how to render razor page to another based on provide logic to login

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How to render a razor page to another razorpage based on its conditions to login

Surya Chandra Mohan 20

Blazor syntax - 
@if (IsPhoneNumberPresent)
{
<RegistrationForm LoginModel="new OtpRegisterVm { Username = LoginPhoneNumber, CountryCode = CountryCode}" /> 
} 
else 
{
<RegistrationForm /> 
}
Razor syntax- 
<div class="px-6 pb-8 pt-3 rounded-t-0">
@if (Model.IsPhoneNumberPresent)
{
<RegistrationForm LoginModel="new OtpRegisterVm { Username = LoginPhoneNumber, CountryCode = CountryCode}" />
}
else
{
<RegistrationForm />
}
</div>