Hi @Manjunath Cycle ,
if your project is a library where you want to use SignalR server functionality, you can add a framework reference to your project.
As @Zhi Lv - MSFT mentioned, SignalR is now contained in the Microsoft.AspNetCore.App framework.
Like:
<ItemGroup>
<FrameworkReference Include="Microsoft.AspNetCore.App" />
</ItemGroup>
Look at this article for more details:
https://learn.microsoft.com/en-us/aspnet/core/fundamentals/target-aspnetcore
Have a nice day!
Jan