diff --git a/src/dotnetCampus.LatestCSharpFeatures.Analyzer/FeatureGenerator.cs b/src/dotnetCampus.LatestCSharpFeatures.Analyzer/FeatureGenerator.cs
index 99a2468..40f2fff 100644
--- a/src/dotnetCampus.LatestCSharpFeatures.Analyzer/FeatureGenerator.cs
+++ b/src/dotnetCampus.LatestCSharpFeatures.Analyzer/FeatureGenerator.cs
@@ -1,4 +1,4 @@
-using dotnetCampus.LatestCSharpFeatures.Analyzer;
+using dotnetCampus.LatestCSharpFeatures.Analyzer;
 
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.Diagnostics;
@@ -19,9 +19,6 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
 
     private void OnExecute(SourceProductionContext context, AnalyzerConfigOptionsProvider provider)
     {
-        // .NET Core 1.0 / .NET Framework 4.7 / .NET Standard 2.0 才开始支持 ValueTuple。
-        GenerateFeatureSource(context, provider, "ValueTuple");
-
         // .NET Core 3.0 / .NET Standard 2.1 才开始支持 Nullable；.NET 5.0 开始支持更多。
         GenerateFeatureSource(context, provider, "Nullable");