Having trouble converting to Microsoft.Graph 5.0.0 and Microsoft.Graph.Core 3.0.0

Question

I'm trying to update NuGet packages for Microsoft.Graph from 4.54.0 to 5.0.0 and Microsoft.Graph.Core from 2.0.15 to 3.0.0

Most of the VB.NET project, .NET Framework 4.8, I inherited has no problem with this change but there are two pieces of code that throw errors:

(I couldn't pick VB.NET as the development language so I picked the closest alternative, ASP.NET even though this is a desktop application)

            'Create a group in MS Teams
            Dim group = New Group With {
                .Description = teamDescription,
                .DisplayName = teamName,
                .GroupTypes = New List(Of String)() From {
                    "Unified"
                },
                .MailEnabled = True,
                .MailNickname = LibraryKey,
                .SecurityEnabled = False,
                .Visibility = If(IsPrivateTeam, "Private", "Public")
            }
            Dim data = Await graphClient.Groups.Request().AddAsync(group)

Looking at the code I think that the group variable was originally defined as a Microsoft.Graph.Group and the graphClient object as a Microsoft.Graph.GraphServiceClient when using the NuGet packages 4.54.0 and 2.0.15 respectively.

Likewise, trying to define a team variable fails

            'Create a team for the group.
            If (responseRef.StatusCode = HttpStatusCode.NoContent) Then
                Dim team = New Team With {
                   .GuestSettings = New TeamGuestSettings With {
                   .AllowCreateUpdateChannels = False,
                   .AllowDeleteChannels = False,
                   .ODataType = Nothing
                    },
                .ODataType = Nothing
                }

                Dim response = Nothing
                Try
                    response = Await graphClient.Groups(data.Id).Team.Request().PutAsync(team)
                Catch ex As Exception
                    'Creating teams API failed sometimes, unfortunately, await method can't be used in vb.net in catch or finally statement, its only available in c#, 
                    'so If the response Is nothing, trying to call the api once again.
                End Try
'etcetera.....

With the previous NuGet packages the variable team was defined as a Microsoft.Graph.Team

Can somebody give me a simple steer on how to change these code snippets so that they will work again with the latest NuGet packages 5.0.0 and 3.0.0 ? I have looked at what documentation I can find but I'm very unfamiliar with these packages and I find it nearly impenetrable, sorry.

Thanks