ASP.NET 3.0 : ArgumentException: Options.ClientId must be provided (Parameter 'ClientId')

I have ASP.NET 3.0 Application, Below is my code When I hit breakpoint I can see my client Id is not null still it results into error

var Test = new OpenIdConnectOptions();
Test.Authority = "XXXXXX"
Test.ClientId = "YYYYYY";
Test.ClientSecret = "ZZZZZZ";

ArgumentException: Options.ClientId must be provided (Parameter 'ClientId')

Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.Validate()

Microsoft.AspNetCore.Authentication.RemoteAuthenticationOptions.Validate(string scheme)

Microsoft.AspNetCore.Authentication.AuthenticationBuilder+<>c__DisplayClass4_0<TOptions, THandler>.<AddSchemeHelper>b__1(TOptions o)

Microsoft.Extensions.Options.ValidateOptions<TOptions>.Validate(string name, TOptions options)

Microsoft.Extensions.Options.OptionsFactory<TOptions>.Create(string name)

Microsoft.Extensions.Options.OptionsMonitor<TOptions>+<>c__DisplayClass11_0.<Get>b__0()

System.Lazy<T>.ViaFactory(LazyThreadSafetyMode mode)

System.Lazy<T>.CreateValue()

System.Lazy<T>.get_Value()

Microsoft.Extensions.Options.OptionsCache<TOptions>.GetOrAdd(string name, Func<TOptions> createOptions)

Microsoft.Extensions.Options.OptionsMonitor<TOptions>.Get(string name)

Microsoft.AspNetCore.Authentication.AuthenticationHandler<TOptions>.InitializeAsync(AuthenticationScheme scheme, HttpContext context)

Microsoft.AspNetCore.Authentication.AuthenticationHandlerProvider.GetHandlerAsync(HttpContext context, string authenticationScheme)

IdentityServer4.Hosting.FederatedSignOut.FederatedSignoutAuthenticationHandlerProvider.GetHandlerAsync(HttpContext context, string authenticationScheme)

Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)

IdentityServer4.Hosting.BaseUrlMiddleware.Invoke(HttpContext context)

Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)