[net7] include net6 templates

Directory.Build.props

@@ -6,6 +6,12 @@
     <_MauiDotNetVersionMinor Condition="'$(_MauiDotNetVersionMinor)' == ''">0</_MauiDotNetVersionMinor>
     <_MauiDotNetVersion Condition="'$(_MauiDotNetVersion)' == ''">$(_MauiDotNetVersionMajor).$(_MauiDotNetVersionMinor)</_MauiDotNetVersion>
     <_MauiDotNetTfm Condition="'$(_MauiDotNetTfm)' == ''">net$(_MauiDotNetVersion)</_MauiDotNetTfm>
+
+    <_MauiPreviousDotNetVersionMajor Condition="'$(_MauiPreviousDotNetVersionMajor)' == ''">6</_MauiPreviousDotNetVersionMajor>
+    <_MauiPreviousDotNetVersionMinor Condition="'$(_MauiPreviousDotNetVersionMinor)' == ''">0</_MauiPreviousDotNetVersionMinor>
+    <_MauiPreviousDotNetVersion Condition="'$(_MauiPreviousDotNetVersion)' == ''">$(_MauiPreviousDotNetVersionMajor).$(_MauiPreviousDotNetVersionMinor)</_MauiPreviousDotNetVersion>
+    <_MauiPreviousDotNetTfm Condition="'$(_MauiPreviousDotNetTfm)' == ''">net$(_MauiPreviousDotNetVersion)</_MauiDotNetTfm>
+
     <_MauiTargetPlatformIdentifier>$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)'))</_MauiTargetPlatformIdentifier>
     <_MauiNoTargetPlatform Condition="'$(_MauiTargetPlatformIdentifier)' == ''">True</_MauiNoTargetPlatform>
     <_MauiTargetPlatformIsAndroid Condition="'$(_MauiTargetPlatformIdentifier)' == 'android'">True</_MauiTargetPlatformIsAndroid>

eng/Versions.props

@@ -1,5 +1,7 @@
 <Project>
   <PropertyGroup>
+    <!-- Current previous .NET SDK major version's stable release of MAUI packages -->
+    <MicrosoftMauiPreviousDotNetReleasedVersion>6.0.400</MicrosoftMauiPreviousDotNetReleasedVersion>
     <!-- dotnet/installer -->
     <MicrosoftDotnetSdkInternalPackageVersion>7.0.100-preview.6.22277.6</MicrosoftDotnetSdkInternalPackageVersion>
     <!-- dotnet/runtime -->

src/Workload/Microsoft.NET.Sdk.Maui/Microsoft.NET.Sdk.Maui.csproj

@@ -74,12 +74,24 @@
         OldValue="@MAUI_GRAPHICS_VERSION@"
         NewValue="$(MicrosoftMauiGraphicsVersion)"
     />
+    <ReplaceText
+        Input="$(IntermediateOutputPath)WorkloadManifest.json"
+        Output="$(IntermediateOutputPath)WorkloadManifest.json"
+        OldValue="@MAUI_PREVIOUS_DOTNET_VERSION@"
+        NewValue="$(_MauiPreviousDotNetVersion)"
+    />
     <ReplaceText
         Input="$(IntermediateOutputPath)WorkloadManifest.json"
         Output="$(IntermediateOutputPath)WorkloadManifest.json"
         OldValue="@MAUI_DOTNET_VERSION@"
         NewValue="$(_MauiDotNetVersion)"
     />
+    <ReplaceText
+        Input="$(IntermediateOutputPath)WorkloadManifest.json"
+        Output="$(IntermediateOutputPath)WorkloadManifest.json"
+        OldValue="@MAUI_PREVIOUS_DOTNET_RELEASED_NUGET_VERSION@"
+        NewValue="$(MicrosoftMauiPreviousDotNetReleasedVersion)"
+    />
     <ReplaceText
         Input="%(_JsonVariableMatrix.OutputPath)"
         Output="%(_JsonVariableMatrix.OutputPath)"

src/Workload/Microsoft.NET.Sdk.Maui/WorkloadManifest.in.json

@@ -31,6 +31,7 @@
           "Microsoft.Maui.Sdk",
           "Microsoft.Maui.Graphics",
           "Microsoft.Maui.Resizetizer.Sdk",
+          "Microsoft.Maui.Templates-@MAUI_PREVIOUS_DOTNET_VERSION@",
           "Microsoft.Maui.Templates-@MAUI_DOTNET_VERSION@",
           "Microsoft.Maui.Core.Ref.any",
           "Microsoft.Maui.Core.Runtime.any",
@@ -293,6 +294,10 @@
     "Microsoft.Maui.Templates-@MAUI_DOTNET_VERSION@": {
       "kind": "template",
       "version": "@VERSION@"
+    },
+    "Microsoft.Maui.Templates-@MAUI_PREVIOUS_DOTNET_VERSION@": {
+      "kind": "template",
+      "version": "@MAUI_PREVIOUS_DOTNET_RELEASED_NUGET_VERSION@"
     }
   }
 }