How to search for nuget package of particular header file

Question

Hi I am pretty new to coding projects and I want to import this script to run it in my project

I have tried including its header but still it kept showing error I am including the link can anyone tell me how to run the script so that I can finish my project.

https://github.com/Esri/arcgis-runtime-samples-dotnet/blob/main/src/ArcGISRuntime.Samples.Shared/Managers/DataManager.cs