[prerelease] Ignore preview versions when locating the .NET runtime. (#8043)

Author: JoeRobich

CHANGELOG.md

@@ -9,7 +9,8 @@
   * Fix file path service, and integration tests (#11556) (PR: [#11556](https://github.com/dotnet/razor/pull/11556))
   * Add ParserOptions and CodeGenerationOptions properties to RazorCodeDocument and rationalize options configuration (#11526) (PR: [#11526](https://github.com/dotnet/razor/pull/11526))
   * Fix parsing of quotes in attribute names (#11543) (PR: [#11543](https://github.com/dotnet/razor/pull/11543))
-  * Bump xamlTools to 17.14.35828.13 (PR: [#8032](https://github.com/dotnet/vscode-csharp/pull/8032))
+* Bump xamlTools to 17.14.35828.13 (PR: [#8032](https://github.com/dotnet/vscode-csharp/pull/8032))
+* Ignore preview versions when locating the .NET runtime (PR: [#8043](https://github.com/dotnet/vscode-csharp/pull/8043))
 
 # 2.67.x
 * Update Razor to 9.0.0-preview.25125.9 (PR: [#8027](https://github.com/dotnet/vscode-csharp/pull/8027))

src/lsptoolshost/dotnetRuntime/dotnetRuntimeExtensionApi.ts

@@ -5,13 +5,20 @@
 
 // Contains APIs defined by the vscode-dotnet-runtime extension
 
+/**
+ * https://github.com/dotnet/vscode-dotnet-runtime/blob/main/vscode-dotnet-runtime-library/src/IDotnetAcquireResult.ts
+ */
 export interface IDotnetAcquireResult {
     dotnetPath: string;
 }
 
+/**
+ * https://github.com/dotnet/vscode-dotnet-runtime/blob/main/vscode-dotnet-runtime-library/src/IDotnetFindPathContext.ts
+ */
 export interface IDotnetFindPathContext {
     acquireContext: IDotnetAcquireContext;
     versionSpecRequirement: DotnetVersionSpecRequirement;
+    rejectPreviews?: boolean;
 }
 
 /**

src/lsptoolshost/dotnetRuntime/dotnetRuntimeExtensionResolver.ts

@@ -51,6 +51,8 @@ export class DotnetRuntimeExtensionResolver implements IHostExecutableResolver {
                 mode: 'runtime',
             },
             versionSpecRequirement: 'greater_than_or_equal',
+            // Reject previews because we are not setting `DOTNET_ROLL_FORWARD_TO_PRERELEASE` when starting the server.
+            rejectPreviews: true,
         };
         let acquireResult = await vscode.commands.executeCommand<IDotnetAcquireResult | undefined>(
             'dotnet.findPath',