[WIP] get templates working

Author: rynowak

src/Components/Blazor/BlazorExtension/src/Microsoft.VisualStudio.BlazorExtension.csproj

@@ -76,7 +76,7 @@
     <CopyBuildOutputToOutputDirectory>true</CopyBuildOutputToOutputDirectory>
     <CopyOutputSymbolsToOutputDirectory>true</CopyOutputSymbolsToOutputDirectory>
   </PropertyGroup>
-  <Target Name="PreCreateVsixContainer" BeforeTargets="CreateVsixContainer">
+  <Target Name="PreCreateVsixContainer" BeforeTargets="GetVsixSourceItems">
     <ItemGroup>
       <VSIXSourceItem Include="$(ProductPackageOutputPath)Microsoft.AspNetCore.Blazor.Templates.*.nupkg">
         <VSIXSubPath>ProjectTemplates\</VSIXSubPath>

src/Components/Blazor/Templates/src/content/BlazorHosted-CSharp/.template.config.src/template.json

@@ -59,12 +59,12 @@
       "datatype": "choice",
       "choices": [
         {
-          "choice": "netcoreapp2.1",
-          "description": "Target netcoreapp2.1"
+          "choice": "netcoreapp3.0",
+          "description": "Target netcoreapp3.0"
         }
       ],
-      "replaces": "netcoreapp2.1",
-      "defaultValue": "netcoreapp2.1"
+      "replaces": "netcoreapp3.0",
+      "defaultValue": "netcoreapp3.0"
     },
     "HostIdentifier": {
       "type": "bind",

src/Components/Blazor/Templates/src/content/BlazorLibrary-CSharp/.template.config.src/template.json

@@ -32,12 +32,12 @@
       "datatype": "choice",
       "choices": [
         {
-          "choice": "netcoreapp2.1",
-          "description": "Target netcoreapp2.1"
+          "choice": "netcoreapp3.0",
+          "description": "Target netcoreapp3.0"
         }
       ],
-      "replaces": "netcoreapp2.1",
-      "defaultValue": "netcoreapp2.1"
+      "replaces": "netcoreapp3.0",
+      "defaultValue": "netcoreapp3.0"
     },
     "HostIdentifier": {
       "type": "bind",

src/Components/Blazor/Templates/src/content/BlazorStandalone-CSharp/.template.config.src/template.json

@@ -32,12 +32,12 @@
       "datatype": "choice",
       "choices": [
         {
-          "choice": "netcoreapp2.1",
-          "description": "Target netcoreapp2.1"
+          "choice": "netcoreapp3.0",
+          "description": "Target netcoreapp3.0"
         }
       ],
-      "replaces": "netcoreapp2.1",
-      "defaultValue": "netcoreapp2.1"
+      "replaces": "netcoreapp3.0",
+      "defaultValue": "netcoreapp3.0"
     },
     "HostIdentifier": {
       "type": "bind",