Can't access the namespace Microsoft.VisualStudio.Debugger.Evaluation in VS 2022 extension project

Question

So I am making an extension for Visual Studio 2022. I want to access the namespace Microsoft.VisualStudio.Debugger.Evaluation in my project (A VSIX project). But when i type this line of code:

using Microsoft.VisualStudio.Debugger.Evaluation;

My IDE will show a red line under it telling me that it can't find the namespace. Does this namespace exist for Visual Studio 2022? Do I need to install something? Was it renamed?