Integrate into new Visual Studio retargeting UI (#9771)

This change integrates into the new retargeting UI in Visual Studio 2026.

When a global.json is present and it is not the latest version in that feature band we will supply retargeting information to Visual Studio to allow the customer to visit the download link to install a suggested SDK.

At this time the suggestion is confined to the same Major.Minor sdk which was specified in the global.json. Note that we will make this suggest even if the customer has a later SDK version globally installed.

We do not, as of this version update global.json or initiate the download or install.

Author: phenning

Directory.Packages.props

@@ -74,6 +74,7 @@
     <PackageVersion Include="Microsoft.VSDesigner"                                                   Version="18.0.1755-preview.1" />
     <PackageVersion Include="VsWebSite.Interop"                                                      Version="18.0.1755-preview.1" />
     <PackageVersion Include="Microsoft.VisualStudio.Debugger.Interop.18.0"                          Version="18.0.1755-preview.1" />
+    <PackageVersion Include="Microsoft.Deployment.DotNet.Releases"                                   Version="2.0.0-rtm.1.25064.1" />
 
     <!-- CPS -->
     <!-- Find versions at https://dev.azure.com/azure-public/vside/_artifacts/feed/vs-impl -->

src/Microsoft.VisualStudio.ProjectSystem.Managed.VS/.releases/.releases.json

@@ -0,0 +1,178 @@
+{
+  "$schema": "https://json.schemastore.org/dotnet-releases-index.json",
+  "releases-index": [
+    {
+      "channel-version": "10.0",
+      "latest-release": "10.0.0-rc.1",
+      "latest-release-date": "2025-09-09",
+      "security": false,
+      "latest-runtime": "10.0.0-rc.1.25451.107",
+      "latest-sdk": "10.0.100-rc.1.25451.107",
+      "product": ".NET",
+      "support-phase": "go-live",
+      "release-type": "lts",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/10.0/releases.json",
+      "supported-os.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/10.0/supported-os.json"
+    },
+    {
+      "channel-version": "9.0",
+      "latest-release": "9.0.9",
+      "latest-release-date": "2025-09-09",
+      "security": false,
+      "latest-runtime": "9.0.9",
+      "latest-sdk": "9.0.305",
+      "product": ".NET",
+      "support-phase": "active",
+      "eol-date": "2026-11-10",
+      "release-type": "sts",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/9.0/releases.json",
+      "supported-os.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/9.0/supported-os.json"
+    },
+    {
+      "channel-version": "8.0",
+      "latest-release": "8.0.20",
+      "latest-release-date": "2025-09-09",
+      "security": false,
+      "latest-runtime": "8.0.20",
+      "latest-sdk": "8.0.414",
+      "product": ".NET",
+      "support-phase": "active",
+      "eol-date": "2026-11-10",
+      "release-type": "lts",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/8.0/releases.json",
+      "supported-os.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/8.0/supported-os.json"
+    },
+    {
+      "channel-version": "7.0",
+      "latest-release": "7.0.20",
+      "latest-release-date": "2024-05-28",
+      "security": true,
+      "latest-runtime": "7.0.20",
+      "latest-sdk": "7.0.410",
+      "product": ".NET",
+      "support-phase": "eol",
+      "eol-date": "2024-05-14",
+      "release-type": "sts",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/7.0/releases.json",
+      "supported-os.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/7.0/supported-os.json"
+    },
+    {
+      "channel-version": "6.0",
+      "latest-release": "6.0.36",
+      "latest-release-date": "2024-11-12",
+      "security": false,
+      "latest-runtime": "6.0.36",
+      "latest-sdk": "6.0.428",
+      "product": ".NET",
+      "support-phase": "eol",
+      "eol-date": "2024-11-12",
+      "release-type": "lts",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/6.0/releases.json",
+      "supported-os.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/6.0/supported-os.json"
+    },
+    {
+      "channel-version": "5.0",
+      "latest-release": "5.0.17",
+      "latest-release-date": "2022-05-10",
+      "security": true,
+      "latest-runtime": "5.0.17",
+      "latest-sdk": "5.0.408",
+      "product": ".NET",
+      "release-type": "sts",
+      "support-phase": "eol",
+      "eol-date": "2022-05-10",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/5.0/releases.json"
+    },
+    {
+      "channel-version": "3.1",
+      "latest-release": "3.1.32",
+      "latest-release-date": "2022-12-13",
+      "security": true,
+      "latest-runtime": "3.1.32",
+      "latest-sdk": "3.1.426",
+      "product": ".NET Core",
+      "release-type": "lts",
+      "support-phase": "eol",
+      "eol-date": "2022-12-13",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/3.1/releases.json"
+    },
+    {
+      "channel-version": "3.0",
+      "latest-release": "3.0.3",
+      "latest-release-date": "2020-02-18",
+      "security": false,
+      "latest-runtime": "3.0.3",
+      "latest-sdk": "3.0.103",
+      "product": ".NET Core",
+      "release-type": "sts",
+      "support-phase": "eol",
+      "eol-date": "2020-03-03",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/3.0/releases.json"
+    },
+    {
+      "channel-version": "2.1",
+      "latest-release": "2.1.30",
+      "latest-release-date": "2021-08-19",
+      "security": true,
+      "latest-runtime": "2.1.30",
+      "latest-sdk": "2.1.818",
+      "product": ".NET Core",
+      "release-type": "lts",
+      "support-phase": "eol",
+      "eol-date": "2021-08-21",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/2.1/releases.json"
+    },
+    {
+      "channel-version": "2.2",
+      "latest-release": "2.2.8",
+      "latest-release-date": "2019-11-19",
+      "security": false,
+      "latest-runtime": "2.2.8",
+      "latest-sdk": "2.2.207",
+      "product": ".NET Core",
+      "release-type": "sts",
+      "support-phase": "eol",
+      "eol-date": "2019-12-23",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/2.2/releases.json"
+    },
+    {
+      "channel-version": "2.0",
+      "latest-release": "2.0.9",
+      "latest-release-date": "2018-07-10",
+      "security": true,
+      "latest-runtime": "2.0.9",
+      "latest-sdk": "2.1.202",
+      "product": ".NET Core",
+      "release-type": "sts",
+      "support-phase": "eol",
+      "eol-date": "2018-10-01",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/2.0/releases.json"
+    },
+    {
+      "channel-version": "1.1",
+      "latest-release": "1.1.13",
+      "latest-release-date": "2019-05-14",
+      "security": true,
+      "latest-runtime": "1.1.13",
+      "latest-sdk": "1.1.14",
+      "product": ".NET Core",
+      "release-type": "lts",
+      "support-phase": "eol",
+      "eol-date": "2019-06-27",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/1.1/releases.json"
+    },
+    {
+      "channel-version": "1.0",
+      "latest-release": "1.0.16",
+      "latest-release-date": "2019-05-14",
+      "security": true,
+      "latest-runtime": "1.0.16",
+      "latest-sdk": "1.1.14",
+      "product": ".NET Core",
+      "release-type": "lts",
+      "support-phase": "eol",
+      "eol-date": "2019-06-27",
+      "releases.json": "https://builds.dotnet.microsoft.com/dotnet/release-metadata/1.0/releases.json"
+    }
+  ]
+}