MA0150 Skip ToString on anonymous types

meziantou · Jan 5, 2024 · 86c9051 · 86c9051
1 parent 4e52050
commit 86c9051
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diff --git a/src/Meziantou.Analyzer/Rules/DoNotUseToStringIfObjectAnalyzer.cs b/src/Meziantou.Analyzer/Rules/DoNotUseToStringIfObjectAnalyzer.cs
@@ -78,6 +78,9 @@ public void AnalyzeInterpolation(OperationAnalysisContext context)
         public void AnalyzeInvocation(OperationAnalysisContext context)
         {
             var operation = (IInvocationOperation)context.Operation;
+            if (operation.Instance?.Type?.IsAnonymousType is true)
+                return;
+
             if (IsDefaultToString(operation.TargetMethod))
                 return;
 

diff --git a/tests/Meziantou.Analyzer.Test/Rules/DoNotUseToStringIfObjectAnalyzerTests.cs b/tests/Meziantou.Analyzer.Test/Rules/DoNotUseToStringIfObjectAnalyzerTests.cs
@@ -295,6 +295,17 @@ await CreateProjectBuilder()
               .ValidateAsync();
     }
 
+    [Fact]
+    public async Task ToString_AnonymousType()
+    {
+        var sourceCode = """
+new { FirstName = "" }.ToString();
+""";
+        await CreateProjectBuilder()
+              .WithSourceCode(sourceCode)
+              .ValidateAsync();
+    }
+
     [Fact]
     public async Task Interpolation_ReproCachingIssue()
     {