Fix for RemoveRedundantToStringCall(RCS1097)

ChangeLog.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Do not remove parameterless empty constructor in a struct with field initializers ([RCS1074](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1074.md)) ([#1021](https://github.com/josefpihrt/roslynator/pull/1021)).
 - Do not suggest to use generic event handler ([RCS1159](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1159.md)) ([#1022](https://github.com/josefpihrt/roslynator/pull/1022)).
 - Fix ([RCS1077](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1077.md)) ([#1023](https://github.com/josefpihrt/roslynator/pull/1023)).
+- Fix ([RCS1097](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1097.md)) ([#1037](https://github.com/JosefPihrt/Roslynator/pull/1037)).
 
 ## [4.2.0] - 2022-11-27
 

src/Analyzers/CSharp/Analysis/RemoveRedundantToStringCallAnalysis.cs

@@ -58,6 +58,7 @@ private static bool IsFixable(
             INamedTypeSymbol containingType = methodSymbol.ContainingType;
 
             if (containingType?.IsReferenceType == true
+                && containingType.SpecialType != SpecialType.System_ValueType
                 && containingType.SpecialType != SpecialType.System_Enum)
             {
                 if (containingType.SpecialType == SpecialType.System_String)

src/Tests/Analyzers.Tests/RCS1097RemoveRedundantToStringCallTests.cs

@@ -105,7 +105,7 @@ void M()
     }
 
     [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.RemoveRedundantToStringCall)]
-    public async Task TestNoDiagnostic_ValueType()
+    public async Task TestNoDiagnostic_Int()
     {
         await VerifyNoDiagnosticAsync(@"
 class C
@@ -116,6 +116,22 @@ void M()
         string s = $""'{i.ToString()}'"";
     }
 }
+");
+    }
+
+    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.RemoveRedundantToStringCall)]
+    public async Task TestNoDiagnostic_Struct()
+    {
+        await VerifyNoDiagnosticAsync(@"
+struct S{}
+class C
+{
+    void M()
+    {
+        S s = new S();
+        string str = $""'{s.ToString()}'"";
+    }
+}
 ");
     }
 }