'MessagesEndpoint' does not contain a definition for 'AsBuilder' and no accessible extension method 'AsBuilder' accepting a first argument of type 'MessagesEndpoint' could be found (are you missing a using directive or an assembly reference?)

[hdl253]

csharp-sdk/samples/QuickstartClient/Program.cs

Line 33 in 4043538

.AsBuilder()

[hdl253]

I meet this error while tried the sample code of "For Client Developers" , the tips of this error bellow:

'MessagesEndpoint' does not contain a definition for 'AsBuilder' and no accessible extension method 'AsBuilder' accepting a first argument of type 'MessagesEndpoint' could be found (are you missing a using directive or an assembly reference?)

Can any one help, thanks!

[ashishpandey1091]

@hdl253 Did you try adding the package reference to the Microsoft.Extensions.AI

<PackageReference Include="Microsoft.Extensions.AI" />