Visual Studio Code – Cannot find Grpc.Tools reference in C# project in Visual Studio 2019

I am not understanding how to use this NuGet package manager in Visual Studio 2019

I installed the Grpc.Tools package from Nuget package manager.

I clicked the checkbox next to the package on solution,
But it shows there is no reference to

using Grpc.Core;

I dont see Grpc.Core under references anywhere,

And when I searched the references I could not find GRPC anywhere

Am I missing something, is there another step to installation?

My code is simple, its below

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using Grpc.Core;

namespace gRPCtest
{
    public class Server : Form
    {
        public Server()
        {
            Text = "Server Window";
            Size = new System.Drawing.Size(300, 200);
        }
    }
    public class Client : Form
    {
        public Client()
        {
            Text = "Client Window";
            Size = new System.Drawing.Size(300, 200);
        }
    }

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Create a new instance of the child window
            Server serverForm = new Server();
            serverForm.Show();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            // Create a new instance of the child window
            Client clientForm = new Client();
            clientForm.Show();
        }
    }
}

In the terminal I tried running the following commands and got errors:

PS C:UsersWaymoDesktopprf.netgRPCtest> NuGetInstall-Package Grpc.Core
NuGetInstall-Package : The module 'NuGet' could not be loaded. For more information, run 'Import-Module NuGet'.
At line:1 char:1
+ NuGetInstall-Package Grpc.Core
+ ~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (NuGetInstall-Package:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CouldNotAutoLoadModule
PS C:UsersWaymoDesktopprf.netgRPCtest> Import-Module NuGet
Import-Module : The specified module 'NuGet' was not loaded because no valid module file was found in any module directory.
At line:1 char:1
+ Import-Module NuGet
+ ~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ResourceUnavailable: (NuGet:String) [Import-Module], FileNotFoundException
    + FullyQualifiedErrorId : Modules_ModuleNotFound,Microsoft.PowerShell.Commands.ImportModuleCommand