Suppress CA1862 for string.Contains on netfx

src/NetAnalyzers/Core/Microsoft.NetCore.Analyzers/Performance/RecommendCaseInsensitiveStringComparison.Analyzer.cs

@@ -34,7 +34,6 @@ public sealed class RecommendCaseInsensitiveStringComparisonAnalyzer : Diagnosti
         internal const string StringIndexOfMethodName = "IndexOf";
         internal const string StringStartsWithMethodName = "StartsWith";
         internal const string StringCompareToMethodName = "CompareTo";
-        internal const string StringComparerCompareMethodName = "Compare";
         internal const string StringEqualsMethodName = "Equals";
         internal const string StringParameterName = "value";
         internal const string StringComparisonParameterName = "comparisonType";
@@ -211,12 +210,19 @@ private void AnalyzeCompilationStart(CompilationStartAnalysisContext context)
                 return;
             }
 
+            ParameterInfo[] stringStringComparisonParameters = {
+                ParameterInfo.GetParameterInfo(stringType),
+                ParameterInfo.GetParameterInfo(stringComparisonType)
+            };
+            IMethodSymbol? containsStringWithStringComparisonMethod
+                = stringType.GetMembers(StringContainsMethodName).OfType<IMethodSymbol>().GetFirstOrDefaultMemberWithParameterInfos(stringStringComparisonParameters);
+
             // a.ToLower().Method(b.ToLower())
             context.RegisterOperationAction(context =>
             {
                 IInvocationOperation invocation = (IInvocationOperation)context.Operation;
                 AnalyzeInvocation(context, invocation, stringType,
-                    containsStringMethod, startsWithStringMethod, compareToStringMethod,
+                    containsStringMethod, containsStringWithStringComparisonMethod, startsWithStringMethod, compareToStringMethod,
                     indexOfStringMethod, indexOfStringInt32Method, indexOfStringInt32Int32Method);
             }, OperationKind.Invocation);
 
@@ -230,13 +236,13 @@ private void AnalyzeCompilationStart(CompilationStartAnalysisContext context)
         }
 
         private static void AnalyzeInvocation(OperationAnalysisContext context, IInvocationOperation invocation, INamedTypeSymbol stringType,
-            IMethodSymbol containsStringMethod, IMethodSymbol startsWithStringMethod, IMethodSymbol compareToStringMethod,
+            IMethodSymbol containsStringMethod, IMethodSymbol? containsStringWithStringComparisonMethod, IMethodSymbol startsWithStringMethod, IMethodSymbol compareToStringMethod,
             IMethodSymbol indexOfStringMethod, IMethodSymbol indexOfStringInt32Method, IMethodSymbol indexOfStringInt32Int32Method)
         {
             IMethodSymbol diagnosableMethod = invocation.TargetMethod;
 
             DiagnosticDescriptor? chosenRule;
-            if (diagnosableMethod.Equals(containsStringMethod) ||
+            if (diagnosableMethod.Equals(containsStringMethod) && containsStringWithStringComparisonMethod is not null ||
                 diagnosableMethod.Equals(startsWithStringMethod) ||
                 diagnosableMethod.Equals(indexOfStringMethod) ||
                 diagnosableMethod.Equals(indexOfStringInt32Method) ||

src/NetAnalyzers/RulesMissingDocumentation.md

@@ -2,5 +2,4 @@
 
 Rule ID | Missing Help Link | Title |
 --------|-------------------|-------|
-CA1515 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1515> | Consider making public types internal |
 CA2262 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2262> | Set 'MaxResponseHeadersLength' properly |

src/NetAnalyzers/UnitTests/Microsoft.NetCore.Analyzers/Performance/RecommendCaseInsensitiveStringComparison.CSharp.Tests.cs

@@ -2,6 +2,7 @@
 
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.Testing;
+using Test.Utilities;
 using Xunit;
 using VerifyCS = Test.Utilities.CSharpCodeFixVerifier<
     Microsoft.NetCore.Analyzers.Performance.RecommendCaseInsensitiveStringComparisonAnalyzer,
@@ -370,6 +371,66 @@ bool M()
             await VerifyFixCSharpAsync(originalCode, originalCode);
         }
 
+        [Fact, WorkItem(7053, "https://github.com/dotnet/roslyn-analyzers/issues/7053")]
+        public Task Net48_Contains_NoDiagnostic()
+        {
+            const string code = """
+                                using System;
+
+                                class C
+                                {
+                                    void M(string s)
+                                    {
+                                        s.ToUpperInvariant().Contains("ABC");
+                                    }
+                                }
+                                """;
+
+            return new VerifyCS.Test
+            {
+                TestCode = code,
+                ReferenceAssemblies = ReferenceAssemblies.NetFramework.Net48.Default,
+                MarkupOptions = MarkupOptions.UseFirstDescriptor
+            }.RunAsync();
+        }
+
+        [Theory, WorkItem(7053, "https://github.com/dotnet/roslyn-analyzers/issues/7053")]
+        [InlineData("StartsWith")]
+        [InlineData("IndexOf")]
+        public Task Net48_Diagnostic(string method)
+        {
+            var code = $$"""
+                         using System;
+
+                         class C
+                         {
+                             void M(string s)
+                             {
+                                 [|s.ToUpperInvariant().{{method}}("ABC")|];
+                             }
+                         }
+                         """;
+            var fixedCode = $$"""
+                              using System;
+
+                              class C
+                              {
+                                  void M(string s)
+                                  {
+                                      s.{{method}}("ABC", StringComparison.InvariantCultureIgnoreCase);
+                                  }
+                              }
+                              """;
+
+            return new VerifyCS.Test
+            {
+                TestCode = code,
+                FixedCode = fixedCode,
+                ReferenceAssemblies = ReferenceAssemblies.NetFramework.Net48.Default,
+                MarkupOptions = MarkupOptions.UseFirstDescriptor
+            }.RunAsync();
+        }
+
         private async Task VerifyNoDiagnosticCSharpAsync(string originalSource)
         {
             VerifyCS.Test test = new()