Exclude anonymous types from MA0150

Author: meziantou

src/Meziantou.Analyzer/Rules/DoNotUseToStringIfObjectAnalyzer.cs

@@ -110,6 +110,9 @@ private void AnalyzeExpression(DiagnosticReporter reporter, IOperation operation
             if (actualType is null)
                 return;
 
+            if (actualType.IsAnonymousType)
+                return;
+
             if (actualType.IsSealed)  // Method cannot be overridden
             {
                 if (!OverrideToString(actualType))

tests/Meziantou.Analyzer.Test/Rules/DoNotUseToStringIfObjectAnalyzerTests.cs

@@ -277,6 +277,18 @@ public async Task Interpolation_Enum()
         var sourceCode = """
 var statusCode = System.Net.HttpStatusCode.OK;
 _ = $"{statusCode}";
+""";
+        await CreateProjectBuilder()
+              .WithSourceCode(sourceCode)
+              .ValidateAsync();
+    }
+    
+    [Fact]
+    public async Task Interpolation_AnonymousType()
+    {
+        var sourceCode = """
+var obj = new { FirstName = "" };
+_ = $"{obj}";
 """;
         await CreateProjectBuilder()
               .WithSourceCode(sourceCode)