Initial commit

.idea/.idea.pcgs-inv/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Rider ignored files
+/.idea.pcgs-inv.iml
+/contentModel.xml
+/modules.xml
+/projectSettingsUpdater.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/.idea.pcgs-inv/.idea/avalonia.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AvaloniaProject">
+    <option name="projectPerEditor">
+      <map>
+        <entry key="PcgsInvUi/App.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+        <entry key="PcgsInvUi/Views/CoinListView.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+        <entry key="PcgsInvUi/Views/DeleteWindow.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+        <entry key="PcgsInvUi/Views/MainWindow.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+        <entry key="PcgsInvUi/Views/MainWindowOld.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+        <entry key="PcgsInvUi/Views/NewControl.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+        <entry key="PcgsInvUi/Views/NewView.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+      </map>
+    </option>
+  </component>
+</project>

.idea/.idea.pcgs-inv/.idea/discord.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DiscordProjectSettings">
+    <option name="show" value="PROJECT_FILES" />
+    <option name="description" value="" />
+  </component>
+</project>

.idea/.idea.pcgs-inv/.idea/encodings.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
+</project>

.idea/.idea.pcgs-inv/.idea/indexLayout.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="UserContentModel">
+    <attachedFolders />
+    <explicitIncludes />
+    <explicitExcludes />
+  </component>
+</project>

PcgsInvUi/App.axaml

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+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="PcgsInvUi.App"
+             xmlns:local="using:PcgsInvUi"
+             RequestedThemeVariant="Dark">
+             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
+
+    <Application.DataTemplates>
+        <local:ViewLocator/>
+    </Application.DataTemplates>
+  
+    <Application.Styles>
+        <FluentTheme />
+        <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Fluent.xaml" />
+    </Application.Styles>
+</Application>

PcgsInvUi/App.axaml.cs

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+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+using PcgsInvUi.ViewModels;
+using PcgsInvUi.Views;
+
+namespace PcgsInvUi;
+
+public partial class App : Application
+{
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        base.OnFrameworkInitializationCompleted();
+        
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            var coins = new Services.CoinCollection();
+            
+            desktop.MainWindow = new MainWindow
+            {
+                DataContext = new MainWindowViewModel(coins),
+            };
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}

PcgsInvUi/Models/Coin.cs

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+using System;
+
+namespace PcgsInvUi.Models;
+
+public class Coin
+{
+    public int PcgsNumber { get; set; }
+    public string Name { get; set; }
+    public int Year { get; set; }
+    public string Denomination { get; set; }
+    public string MintMark { get; set; }
+    public string Grade { get; set; }
+    public double PriceGuideValue { get; set; }
+    public string CoinFactsLink { get; set; }
+    public string MajorVariety { get; set; }
+    public string MinorVariety { get; set; }
+    public string DieVariety { get; set; }
+    public string Series { get; set; }
+    public string Category { get; set; }
+    public string Designation { get; set; }
+    public int CertificateNumber { get; set; }
+    public int Quantity { get; set; }
+    public double TotalPrice => Quantity * PriceGuideValue;
+    public double PaidFor { get; set; }
+    public String Notes { get; set; }
+}

PcgsInvUi/PcgsInvUi.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <AvaloniaResource Include="Assets\**" />
+  </ItemGroup>
+
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.0.2" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.0.2" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.2" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.2" />
+    <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
+    <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.0.2" />
+    <PackageReference Include="Avalonia.ReactiveUI" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+  </ItemGroup>
+</Project>

PcgsInvUi/Program.cs

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+using Avalonia;
+using Avalonia.ReactiveUI;
+using System;
+
+namespace PcgsInvUi;
+
+class Program
+{
+    // Initialization code. Don't use any Avalonia, third-party APIs or any
+    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+    // yet and stuff might break.
+    [STAThread]
+    public static void Main(string[] args) => BuildAvaloniaApp()
+        .StartWithClassicDesktopLifetime(args);
+
+    // Avalonia configuration, don't remove; also used by visual designer.
+    public static AppBuilder BuildAvaloniaApp()
+        => AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+            .WithInterFont()
+            .LogToTrace()
+            .UseReactiveUI();
+}

PcgsInvUi/Services/CoinCollection.cs

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+using System.Collections.Generic;
+using PcgsInvUi.Models;
+
+namespace PcgsInvUi.Services;
+
+public class CoinCollection
+{
+    public IEnumerable<Coin> GetItems() => new[]
+    {
+        new Coin(),
+        new Coin(),
+        new Coin(),
+    };
+}

PcgsInvUi/Services/Database.cs

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+namespace PcgsInvUi.Services;
+
+public class Database
+{
+    // TODO Create a database using SQLite.
+}

PcgsInvUi/Services/PcgsClient.cs

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+using System;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using PcgsInvUi.Models;
+
+namespace PcgsInvUi.Services;
+
+public class PcgsClient
+{
+    private string _apiUri = "https://api.pcgs.com/publicapi";
+    private readonly string _apiKey;
+
+    public PcgsClient(string apiKey)
+    {
+        _apiKey = apiKey;
+    }
+
+    public async Task<Coin> GetCoinFactsByGrade(int pcgsNumber, int grade, bool plusGrade)
+    {
+        Coin newCoin = null;
+        using (HttpClient client = new HttpClient())
+        {
+            string requestUri =
+                $"{_apiUri}/coindetail/GetCoinFactsByGrade/?PCGSNo={pcgsNumber}&GradeNo={grade}&PlusGrade={plusGrade}";
+            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", _apiKey);
+            HttpResponseMessage response = await client.GetAsync(requestUri);
+
+            if (response.IsSuccessStatusCode)
+            {
+                string jsonResponse = await response.Content.ReadAsStringAsync();
+                newCoin = ParseJsonResponse(jsonResponse);
+            }
+            else
+            {
+                Console.WriteLine($"Error: {response.StatusCode} - {response.ReasonPhrase}");
+            }
+        }
+
+        return newCoin;
+    }
+        
+    // TODO Will eventually create the other methods that are included in the Public API.
+
+    private Coin ParseJsonResponse(string json)
+    {
+        Coin newCoin = JsonConvert.DeserializeObject<Coin>(json);
+        return newCoin;
+    }
+}

PcgsInvUi/ViewLocator.cs

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+using System;
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using PcgsInvUi.ViewModels;
+
+namespace PcgsInvUi;
+
+public class ViewLocator : IDataTemplate
+{
+    public Control Build(object data)
+    {
+        var name = data.GetType().FullName!.Replace("ViewModel", "View");
+        var type = Type.GetType(name);
+
+        if (type != null)
+        {
+            return (Control)Activator.CreateInstance(type)!;
+        }
+        
+        return new TextBlock { Text = "Not Found: " + name };
+    }
+
+    public bool Match(object data)
+    {
+        return data is ViewModelBase;
+    }
+}

PcgsInvUi/ViewModels/CoinListViewModel.cs

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+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using PcgsInvUi.Models;
+using ReactiveUI;
+
+namespace PcgsInvUi.ViewModels;
+
+public class CoinListViewModel : ViewModelBase
+{
+    public ObservableCollection<Coin> CoinCollection { get; set; }
+    private float _totalValue;
+    public float TotalValue
+    {
+        get => _totalValue;
+        set => this.RaiseAndSetIfChanged(ref _totalValue, value);
+    }
+    public Coin? SelectedCoin { get; set; }
+    
+    public CoinListViewModel(IEnumerable<Coin> items)
+    {
+        CoinCollection = new ObservableCollection<Coin>(items);
+        TotalValue = 0;
+    }
+}

PcgsInvUi/ViewModels/MainWindowViewModel.cs

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+using System;
+using System.Reactive.Linq;
+using PcgsInvUi.Models;
+using PcgsInvUi.Services;
+using ReactiveUI;
+
+namespace PcgsInvUi.ViewModels;
+
+public class MainWindowViewModel : ViewModelBase
+{
+    public CoinListViewModel List { get; }
+    private ViewModelBase _content;
+    
+    public MainWindowViewModel(CoinCollection coins)
+    {
+        List = new CoinListViewModel(coins.GetItems());
+        Content = List;
+    }
+    
+    public ViewModelBase Content
+    {
+        get => _content;
+        private set => this.RaiseAndSetIfChanged(ref _content, value);
+    }
+
+    public void AddItem()
+    {
+        Console.WriteLine("You hit the button!");
+        var newViewModel = new NewViewModel();
+
+        Observable.Merge(
+                newViewModel.OkCommand,
+                newViewModel.CancelCommand.Select(_ => (Coin?)null))
+            .Take(1)
+            .Subscribe(model =>
+            {
+                if (model != null)
+                    List.CoinCollection.Add(model);
+
+                Content = List;
+            });
+        
+        Content = newViewModel;
+    }
+}

PcgsInvUi/ViewModels/NewViewModel.cs

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+using System;
+using System.Reactive;
+using PcgsInvUi.Models;
+using ReactiveUI;
+
+namespace PcgsInvUi.ViewModels;
+
+public class NewViewModel : ViewModelBase
+{
+    private string _pcgsNumber;
+    private string _grade;
+    private string _quantity;
+    
+    public string PcgsNumber
+    {
+        get => _pcgsNumber;
+        set => this.RaiseAndSetIfChanged(ref _pcgsNumber, value);
+    }
+    public string Grade
+    {
+        get => _grade;
+        set => this.RaiseAndSetIfChanged(ref _grade, value);
+    }
+    public string Quantity
+    {
+        get => _quantity;
+        set => this.RaiseAndSetIfChanged(ref _quantity, value);
+    }
+    
+    public NewViewModel()
+    {
+        var okEnabled = this.WhenAnyValue(
+            x => x.PcgsNumber,
+            x => !string.IsNullOrWhiteSpace(x));
+
+        OkCommand = ReactiveCommand.Create(
+            () => new Coin { PcgsNumber = Int32.Parse(PcgsNumber) },
+            okEnabled);
+        CancelCommand = ReactiveCommand.Create(() => { });
+    }
+
+    public ReactiveCommand<Unit, Coin> OkCommand { get; }
+    public ReactiveCommand<Unit, Unit> CancelCommand { get; }
+
+}

PcgsInvUi/ViewModels/ViewModelBase.cs

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+using ReactiveUI;
+
+namespace PcgsInvUi.ViewModels;
+
+public class ViewModelBase : ReactiveObject
+{
+}

PcgsInvUi/Views/CoinListView.axaml

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+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:viewModels="clr-namespace:PcgsInvUi.ViewModels"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="PcgsInvUi.Views.CoinListView"
+             x:DataType="viewModels:CoinListViewModel">
+    <DockPanel>
+        <DockPanel DockPanel.Dock="Top">
+            <DataGrid x:Name="CollectionView"
+                      HorizontalAlignment="Stretch"
+                      VerticalAlignment="Top"
+                      DockPanel.Dock="Top"
+                      ItemsSource="{Binding CoinCollection}"
+                      SelectedItem="{Binding SelectedCoin, Mode=TwoWay}"
+                      AutoGenerateColumns="False"
+                      CanUserResizeColumns="True" >
+                <DataGrid.Columns>
+                    <DataGridTextColumn Header="Series" Width="*"
+                                        Binding="{Binding Series}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Year"         
+                                        Binding="{Binding Year}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Mint" Width="*"
+                                        Binding="{Binding MintMark}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Denomination" Width="*"
+                                        Binding="{Binding Denomination}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Variety" Width="*"
+                                        Binding="{Binding MajorVariety}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Grade" Width="*"
+                                        Binding="{Binding Grade}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Designation" Width="*"
+                                        Binding="{Binding Designation}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Est. Price" Width="*"
+                                        Binding="{Binding PriceGuideValue}" 
+                                        IsReadOnly="False"/>
+                    <DataGridTextColumn Header="PCGS #" Width="*"
+                                        Binding="{Binding PcgsNumber}"
+                                        IsReadOnly="True"/>
+                    <DataGridTextColumn Header="Quantity" Width="*"
+                                        Binding="{Binding Quantity}" 
+                                        IsReadOnly="False"/>
+                    <DataGridTextColumn Header="Total Price" Width="*"
+                                        Binding="{Binding TotalPrice}"
+                                        IsReadOnly="True" />
+                </DataGrid.Columns>
+            </DataGrid>
+        </DockPanel>
+        <DockPanel DockPanel.Dock="Bottom">
+            <Grid HorizontalAlignment="Left" VerticalAlignment="Bottom" Margin="5" ColumnDefinitions="Auto, Auto, Auto, Auto" DockPanel.Dock="Left">
+                <Button Grid.Column="0" Margin="5" Width="100" HorizontalContentAlignment="Center" Content="New..." />
+                <Button Grid.Column="1" Margin="5" Width="100" HorizontalContentAlignment="Center" Content="Edit..." />
+                <Button Grid.Column="2" Margin="5" Width="100" HorizontalContentAlignment="Center" Content="Delete"  />
+                <Button Grid.Column="3" Margin="5" Width="100" HorizontalContentAlignment="Center" Content="Find..." 
+                        Command="{Binding $parent[Window].((viewModels:MainWindowViewModel)DataContext).AddItem}"/>
+            </Grid>
+            <Grid HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="5" ColumnDefinitions="Auto, Auto" DockPanel.Dock="Right">
+                <Label Grid.Column="0" Margin="5" VerticalAlignment="Center" Content="{Binding TotalValue, StringFormat='Total Value: ${0:0.00}'}" />
+                <Button Grid.Column="1" Margin="5" Width="150" HorizontalContentAlignment="Center" Content="Export to CSV..." />
+            </Grid>
+        </DockPanel>
+    </DockPanel>
+</UserControl>

PcgsInvUi/Views/CoinListView.axaml.cs

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+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PcgsInvUi.Views;
+
+public partial class CoinListView : UserControl
+{
+    public CoinListView()
+    {
+        InitializeComponent();
+    }
+}

PcgsInvUi/Views/DeleteWindow.axaml

@@ -0,0 +1,24 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        d:DesignWidth="325" d:DesignHeight="100"
+        x:Class="PcgsInvUi.Views.DeleteWindow"
+        Width="325" Height="100" WindowStartupLocation="CenterOwner"
+        Title="DeleteWindow">
+    <Grid ColumnDefinitions="*, *" RowDefinitions="*, *">
+        <Label Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"  Margin="10"
+               HorizontalAlignment="Center" VerticalAlignment="Center"
+               Content="Are you sure you want to delete this item?"/>
+        <Button Grid.Row="1" Grid.Column="0" Margin="5" 
+                Width="100"
+                HorizontalAlignment="Stretch" VerticalAlignment="Center" 
+                HorizontalContentAlignment="Center"
+                Content="Yes" Click="AcceptClicked"/>
+        <Button Grid.Row="1" Grid.Column="1" Margin="5"
+                Width="100"
+                HorizontalAlignment="Stretch" VerticalAlignment="Center" 
+                HorizontalContentAlignment="Center" 
+                Content="No" Click="CancelClicked"/>
+    </Grid>
+</Window>

PcgsInvUi/Views/DeleteWindow.axaml.cs

@@ -0,0 +1,27 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace PcgsInvUi.Views;
+
+public partial class DeleteWindow : Window
+{
+    public bool Accepted { get; set; }
+    
+    public DeleteWindow()
+    {
+        InitializeComponent();
+        Accepted = false;
+    }
+    
+    public void AcceptClicked(object source, RoutedEventArgs args)
+    {
+        // TODO Delete the SelectedCoin?
+        Accepted = true;
+        Close();
+    }
+    
+    public void CancelClicked(object source, RoutedEventArgs args)
+    {
+        Close();
+    }
+}

PcgsInvUi/Views/MainWindow.axaml

@@ -0,0 +1,9 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:viewModels="clr-namespace:PcgsInvUi.ViewModels"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="PcgsInvUi.Views.MainWindow" x:DataType="viewModels:MainWindowViewModel"
+        Title="MainWindow"
+        Content="{Binding Content}" />

PcgsInvUi/Views/MainWindow.axaml.cs

@@ -0,0 +1,28 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PcgsInvUi.Views;
+
+public partial class MainWindow : Window
+{
+    // TODO New window.
+    // TODO Edit window.
+    // TODO Delete window.
+    // TODO Find window.
+    // TODO Export window.
+    // TODO Error handling.
+    // TODO Manual handling of API key.
+    // TODO Use CoinFacts link.
+    // TODO Export to CSV.
+    // TODO Take giant sheet of coins to integrate into the application.
+    // TODO Update all coins.
+    // TODO API request tracker (1000 per day)
+    // TODO API update schedules (per month? manual override? needs to store a date of last update in the coin object)
+
+    
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+}

PcgsInvUi/Views/NewControl.axaml

@@ -0,0 +1,24 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:viewmodels="clr-namespace:PcgsInvUi.ViewModels"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="PcgsInvUi.Views.NewControl" x:DataType="viewmodels:NewViewModel">
+    <DockPanel>
+        <Grid DockPanel.Dock="Top" ColumnDefinitions="Auto, *" RowDefinitions="*, *, *">
+            <Label Grid.Column="0" Grid.Row="0" Margin="5, 5, 20, 5" VerticalAlignment="Center" Content="PCGS #:"/>
+            <TextBox Grid.Column="1" Grid.Row="0" Margin="5, 5, 10, 5" />
+            <Label Grid.Column="0" Grid.Row="1" Margin="5, 5, 20, 5" VerticalAlignment="Center" Content="Grade:"/>
+            <ComboBox Name="GradeChoices" Grid.Column="1" Grid.Row="1" SelectedIndex="0" Margin="5, 5, 10, 5" />
+            <Label Grid.Column="0" Grid.Row="2" Margin="5, 5, 20, 5" VerticalAlignment="Center" Content="Quantity:"/>
+            <TextBox Grid.Column="1" Grid.Row="2" Margin="5, 5, 10, 5" />
+        </Grid>
+        <Grid DockPanel.Dock="Bottom" ColumnDefinitions="*, *">
+            <Button Grid.Column="0" Margin="5" HorizontalAlignment="Center" VerticalAlignment="Center" 
+                    Width="90" HorizontalContentAlignment="Center" Content="OK" Command="{Binding OkCommand}" />
+            <Button Grid.Column="1" Margin="5" HorizontalAlignment="Center" VerticalAlignment="Center" 
+                    Width="90" HorizontalContentAlignment="Center" Content="Cancel" Command="{Binding CancelCommand}"/>
+        </Grid>
+    </DockPanel>
+</UserControl>

PcgsInvUi/Views/NewControl.axaml.cs

@@ -0,0 +1,64 @@
+using System.Collections.ObjectModel;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+namespace PcgsInvUi.Views;
+
+public partial class NewControl : UserControl
+{
+    public string SelectedGrade { get; set; } = "";
+    
+    public void AcceptClick(object source, RoutedEventArgs args)
+    {
+        // TODO Send a message to the MainWindow to add a new coin and close the NewControl.
+    }
+    
+    public void CancelClick(object source, RoutedEventArgs args)
+    {
+        // TODO Send a message to the MainWindow to close the NewControl.
+    }
+
+    public NewControl()
+    {
+        InitializeComponent();
+        GradeChoices.SelectedItem = SelectedGrade;
+        // Had to type this out - there's no pattern to follow.
+        GradeChoices.ItemsSource = new ObservableCollection<string>()
+        {
+            "PO01",
+            "FR02",
+            "AG03",
+            "G04",
+            "G06",
+            "VG08",
+            "VG10",
+            "F12",
+            "F15",
+            "VF20",
+            "VF25",
+            "VF30",
+            "VF35",
+            "EF40",
+            "EF45",
+            "AU50",
+            "AU53",
+            "AU55",
+            "AU58",
+            "MS60",
+            "MS61",
+            "MS62",
+            "MS63",
+            "MS64",
+            "MS65",
+            "MS66",
+            "MS67",
+            "MS68",
+            "MS69",
+            "MS70"
+        };
+    }
+    
+    public NewControl(object? context = null) : this()
+    {
+        DataContext = context;
+    }
+}

PcgsInvUi/Views/NewView.axaml

@@ -0,0 +1,25 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:viewmodels="clr-namespace:PcgsInvUi.ViewModels"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="PcgsInvUi.Views.NewView" x:DataType="viewmodels:NewViewModel">
+    <DockPanel>
+        <Grid DockPanel.Dock="Top" ColumnDefinitions="Auto, *" RowDefinitions="*, *, *">
+            <Label Grid.Column="0" Grid.Row="0" Margin="5, 5, 20, 5" VerticalAlignment="Center" Content="PCGS #:"/>
+            <TextBox Grid.Column="1" Grid.Row="0" Margin="5, 5, 10, 5" Text="{Binding PcgsNumber}"/>
+            <Label Grid.Column="0" Grid.Row="1" Margin="5, 5, 20, 5" VerticalAlignment="Center" Content="Grade:"/>
+            <ComboBox Name="GradeChoices" Grid.Column="1" Grid.Row="1" SelectedIndex="0" Margin="5, 5, 10, 5"
+                      SelectedItem="{Binding Grade}"/>
+            <Label Grid.Column="0" Grid.Row="2" Margin="5, 5, 20, 5" VerticalAlignment="Center" Content="Quantity:"/>
+            <TextBox Grid.Column="1" Grid.Row="2" Margin="5, 5, 10, 5" Text="{Binding Quantity}"/>
+        </Grid>
+        <Grid DockPanel.Dock="Bottom" ColumnDefinitions="*, *">
+            <Button Grid.Column="0" Margin="5" HorizontalAlignment="Center" VerticalAlignment="Center" 
+                    Width="90" HorizontalContentAlignment="Center" Content="OK" Command="{Binding OkCommand}"/>
+            <Button Grid.Column="1" Margin="5" HorizontalAlignment="Center" VerticalAlignment="Center" 
+                    Width="90" HorizontalContentAlignment="Center" Content="Cancel" Command="{Binding CancelCommand}" />
+        </Grid>
+    </DockPanel>
+</UserControl>

PcgsInvUi/Views/NewView.axaml.cs

@@ -0,0 +1,13 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PcgsInvUi.Views;
+
+public partial class NewView : UserControl
+{
+    public NewView()
+    {
+        InitializeComponent();
+    }
+}

PcgsInvUi/app.manifest

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <!-- This manifest is used on Windows only.
+       Don't remove it as it might cause problems with window transparency and embeded controls.
+       For more details visit https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests -->
+  <assemblyIdentity version="1.0.0.0" name="PcgsInvUi.Desktop"/>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- A list of the Windows versions that this application has been tested on
+           and is designed to work with. Uncomment the appropriate elements
+           and Windows will automatically select the most compatible environment. -->
+
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+    </application>
+  </compatibility>
+</assembly>

PcgsInvUi/bin/Debug/net6.0/PcgsInvUi.runtimeconfig.json

@@ -0,0 +1,12 @@
+{
+  "runtimeOptions": {
+    "tfm": "net6.0",
+    "framework": {
+      "name": "Microsoft.NETCore.App",
+      "version": "6.0.0"
+    },
+    "configProperties": {
+      "System.Runtime.InteropServices.BuiltInComInterop.IsSupported": true
+    }
+  }
+}