Slow response in multi-select RadzenDropDown

[Peter1]

I have a problem showing a RadzenDropDown with a delay of about 10 sec the first time it is displayed.

The problem can easily be reproduced:

1. Create a new Blazor Server App with the default sample pages using .net8 and VS2022 Prof and insatll the Radzen components.
2. Add the code listed below to "Home.razor". At this point all works well. Starting the app is fast and the dropdown shows the correct result.
3. Now install the NuGet Package "Microsoft.Graph" - latest version 5.47.0
   When you now start the app you have to wait more than 10 seconds.

The delay only occurs if you set Multiple=true.
Do you have an idea how to solve this problem?

---

Code to be added in Home.razr

@code {
IList values = new int { 1, 2 };

public class Product
{
    public int ProductID { get; set; }
    public string ProductName { get; set; }
}

IEnumerable<Product> products;

protected override async Task OnInitializedAsync()
{
    await base.OnInitializedAsync();

    List<Product> _products = new();
    _products.Add(new Product() { ProductID = 1, ProductName = "Test 1" });
    _products.Add(new Product() { ProductID = 2, ProductName = "Test 2" });
    _products.Add(new Product() { ProductID = 3, ProductName = "Test 3" });
    _products.Add(new Product() { ProductID = 4, ProductName = "Test 4" });
    products = _products;
}

}

[korchev]

@Peter1

Now install the NuGet Package "Microsoft.Graph" - latest version 5.47.0
When you now start the app you have to wait more than 10 seconds.

I think another user experienced similar issues with that package that are unrelated to the Radzen.Blazor components. Does removing that package resolve the problem? I think it somehow slows down Blazor initialization as a whole and affects everything else.

[Peter1]

Yes, after removing the package the normal speed is back. But this does not really solve the problem as there is no real alternative Package to implement AD functions.
I hope you can find out why this MS Graph packages impacts the Radzen packages in such way.

[michaelakin]

Me too. This did happen for me also with a Radzen Grid, and clicking on the sort of a column. Not sure why the MS package affects Radzen so dramatically.

[michaelakin]

I tried to add this bug to Microsoft. Maybe you guys could work with them on it.

Adding the Microsoft.Graph nuget package dramatically slows down Radzen Data grid on the first data sort.