DYN-9958 WebView2 Cache Folder

src/DynamoCoreWpf/Utilities/WebView2Utilities.cs

@@ -1,7 +1,10 @@
 using System;
+using System.Diagnostics;
+using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
+using Dynamo.Configuration;
 using Dynamo.Models;
 using Dynamo.Wpf.Properties;
 using DynamoUtilities;
@@ -103,5 +106,21 @@ public static bool ValidateWebView2RuntimeInstalled()
                 return false;
             }
         }
+
+        /// <summary>
+        /// Returns the user data folder path for WebView2 (used in SplashScreen, HomePage, PackageManagerWizard)
+        /// </summary>
+        /// <returns>user data folder path for WebView2</returns>
+        internal static string GetTempDirectory()
+        {
+            // Create a temp folder unique to this Dynamo instance based on process id
+            string localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+            string tmpDataFolder = Path.Combine(
+                localAppData,
+                "Temp",
+                Configurations.DynamoAsString,
+                "WebView2");
+            return tmpDataFolder;
+        }
     }
 }

src/DynamoCoreWpf/Views/HomePage/HomePage.xaml.cs

@@ -137,11 +137,7 @@ private void DynamoViewModel_PropertyChanged(object sender, System.ComponentMode
         /// <returns></returns>
         private static string GetUserDirectory()
         {
-            var version = AssemblyHelper.GetDynamoVersion();
-
-            var folder = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
-            return Path.Combine(Path.Combine(folder, "Dynamo", "Dynamo Core"),
-                            String.Format("{0}.{1}", version.Major, version.Minor));
+            return WebView2Utilities.GetTempDirectory();
         }
 
         private async void UserControl_Loaded(object sender, System.Windows.RoutedEventArgs e)

src/DynamoCoreWpf/Views/PackageManager/Components/PackageManagerWizard/PackageManagerWizard.xaml.cs

@@ -1007,11 +1007,7 @@ internal bool ProcessUri(string uri)
         /// <returns></returns>
         private static string GetUserDirectory()
         {
-            var version = AssemblyHelper.GetDynamoVersion();
-
-            var folder = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
-            return Path.Combine(Path.Combine(folder, "Dynamo", "Dynamo Core"),
-                            String.Format("{0}.{1}", version.Major, version.Minor));
+            return WebView2Utilities.GetTempDirectory();
         }
 
         /// <summary>

src/DynamoCoreWpf/Views/SplashScreen/SplashScreen.xaml.cs

@@ -342,11 +342,7 @@ private void DynamoModel_RequestUpdateLoadBarStatus(SplashScreenLoadEventArgs ar
         /// <returns></returns>
         private string GetUserDirectory()
         {
-            var version = AssemblyHelper.GetDynamoVersion();
-
-            var folder = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
-            return Path.Combine(Path.Combine(folder, Configurations.DynamoAsString, "Dynamo Core"),
-                            String.Format("{0}.{1}", version.Major, version.Minor));
+            return WebView2Utilities.GetTempDirectory();
         }
 
         protected override async void OnContentRendered(EventArgs e)