create wpf .net core 3 desktop project.

eyes-and-ears/eyes-and-ears.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29709.97
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "eyes-and-ears.wpf", "eyes-and-ears.wpf\eyes-and-ears.wpf.csproj", "{AECFBF65-7B27-4C08-B82A-E665D68D004C}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{AECFBF65-7B27-4C08-B82A-E665D68D004C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{AECFBF65-7B27-4C08-B82A-E665D68D004C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{AECFBF65-7B27-4C08-B82A-E665D68D004C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{AECFBF65-7B27-4C08-B82A-E665D68D004C}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {520BC426-533B-40E1-81AD-99A516658FB6}
+	EndGlobalSection
+EndGlobal

eyes-and-ears/eyes-and-ears.wpf/App.xaml

@@ -0,0 +1,9 @@
+<Application x:Class="eyes_and_ears.wpf.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:eyes_and_ears.wpf"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>

eyes-and-ears/eyes-and-ears.wpf/App.xaml.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace eyes_and_ears.wpf {
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application {
+    }
+}

eyes-and-ears/eyes-and-ears.wpf/AssemblyInfo.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]

eyes-and-ears/eyes-and-ears.wpf/MainWindow.xaml

@@ -0,0 +1,12 @@
+<Window x:Class="eyes_and_ears.wpf.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        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:local="clr-namespace:eyes_and_ears.wpf"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800">
+    <Grid>
+
+    </Grid>
+</Window>

eyes-and-ears/eyes-and-ears.wpf/MainWindow.xaml.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace eyes_and_ears.wpf {
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window {
+        public MainWindow() {
+            InitializeComponent();
+        }
+    }
+}

eyes-and-ears/eyes-and-ears.wpf/eyes-and-ears.wpf.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>eyes_and_ears.wpf</RootNamespace>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+</Project>