Fix analyzer RCS1077 - Handle IQueryable<T>

ChangeLog.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix analyzer [RCS1202](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1202) ([PR](https://github.com/dotnet/roslynator/pull/1542))
 - Fix analyzer [RCS1246](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1246) ([PR](https://github.com/dotnet/roslynator/pull/1543))
 - Fix analyzer [RCS1140](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1140) ([PR](https://github.com/dotnet/roslynator/pull/1524))
+- Fix analyzer [RCS1077](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1077) ([PR](https://github.com/dotnet/roslynator/pull/1544))
 
 ## [4.12.6] - 2024-09-23
 

src/Analyzers/CSharp/Analysis/OptimizeLinqMethodCallAnalysis.cs

@@ -718,6 +718,14 @@ public static void AnalyzeOrderByIdentity(SyntaxNodeAnalysisContext context, in
         if (lambdaExpression.Body is not IdentifierNameSyntax identifier || identifier.Identifier.Text != lambdaExpression.Parameter.Identifier.Text)
             return;
 
+        if (context.SemanticModel
+            .GetTypeSymbol(invocationInfo.Expression, context.CancellationToken)?
+            .OriginalDefinition
+            .HasMetadataName(MetadataNames.System_Linq_IQueryable_T) == true)
+        {
+            return;
+        }
+
         TextSpan span = TextSpan.FromBounds(invocationInfo.Name.SpanStart, invocationExpression.Span.End);
         Report(context, invocationExpression, span, checkDirectives: true);
     }

src/Tests/Analyzers.Tests/RCS1077OptimizeLinqMethodCallTests.cs

@@ -1560,6 +1560,23 @@ void M()
         list.FirstOrDefault(predicate);
     }
 }
+");
+    }
+
+    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.OptimizeLinqMethodCall)]
+    public async Task TestNoDiagnostic_OrderByToOrder_IQueryable()
+    {
+        await VerifyNoDiagnosticAsync(@"
+using System.Linq;
+
+class C
+{
+    void M()
+    {
+        IQueryable<string> q = null;
+        var x = q.OrderBy(f => f);
+    }
+}
 ");
     }
 }