diff --git a/src/Microsoft.OpenApi.Readers/V2/OpenApiDocumentDeserializer.cs b/src/Microsoft.OpenApi.Readers/V2/OpenApiDocumentDeserializer.cs
index 92643cb92..dad25cae7 100644
--- a/src/Microsoft.OpenApi.Readers/V2/OpenApiDocumentDeserializer.cs
+++ b/src/Microsoft.OpenApi.Readers/V2/OpenApiDocumentDeserializer.cs
@@ -21,22 +21,22 @@ internal static partial class OpenApiV2Deserializer
         private static FixedFieldMap<OpenApiDocument> _openApiFixedFields = new()
         {
             {
-                "swagger", (o, n) =>
+                "swagger", (_, _) =>
                 {
                 } /* Version is valid field but we already parsed it */
             },
             {"info", (o, n) => o.Info = LoadInfo(n)},
-            {"host", (o, n) => n.Context.SetTempStorage("host", n.GetScalarValue())},
-            {"basePath", (o, n) => n.Context.SetTempStorage("basePath", n.GetScalarValue())},
+            {"host", (_, n) => n.Context.SetTempStorage("host", n.GetScalarValue())},
+            {"basePath", (_, n) => n.Context.SetTempStorage("basePath", n.GetScalarValue())},
             {
-                "schemes", (o, n) => n.Context.SetTempStorage(
+                "schemes", (_, n) => n.Context.SetTempStorage(
                     "schemes",
                     n.CreateSimpleList(
                         s => s.GetScalarValue()))
             },
             {
                 "consumes",
-                (o, n) =>
+                (_, n) =>
                 {
                     var consumes = n.CreateSimpleList(s => s.GetScalarValue());
                     if (consumes.Count > 0)
@@ -46,7 +46,7 @@ internal static partial class OpenApiV2Deserializer
                 }
             },
             {
-                "produces", (o, n) => {
+                "produces", (_, n) => {
                     var produces = n.CreateSimpleList(s => s.GetScalarValue());
                     if (produces.Count > 0)
                     {
diff --git a/src/Microsoft.OpenApi.Readers/V2/OpenApiOperationDeserializer.cs b/src/Microsoft.OpenApi.Readers/V2/OpenApiOperationDeserializer.cs
index c7a7d723b..151c6b3bb 100644
--- a/src/Microsoft.OpenApi.Readers/V2/OpenApiOperationDeserializer.cs
+++ b/src/Microsoft.OpenApi.Readers/V2/OpenApiOperationDeserializer.cs
@@ -57,7 +57,7 @@ internal static partial class OpenApiV2Deserializer
                     }
                 },
                 {
-                    "consumes", (o, n) => {
+                    "consumes", (_, n) => {
                         var consumes = n.CreateSimpleList(s => s.GetScalarValue());
                         if (consumes.Count > 0) {
                             n.Context.SetTempStorage(TempStorageKeys.OperationConsumes,consumes);
@@ -65,7 +65,7 @@ internal static partial class OpenApiV2Deserializer
                     }
                 },
                 {
-                    "produces", (o, n) => {
+                    "produces", (_, n) => {
                         var produces = n.CreateSimpleList(s => s.GetScalarValue());
                         if (produces.Count > 0) {
                             n.Context.SetTempStorage(TempStorageKeys.OperationProduces, produces);
@@ -185,7 +185,7 @@ private static OpenApiRequestBody CreateFormBody(ParsingContext context, List<Op
             {
                 Content = consumes.ToDictionary(
                     k => k,
-                    v => mediaType)
+                    _ => mediaType)
             };
 
             return formBody;
@@ -205,7 +205,7 @@ internal static OpenApiRequestBody CreateRequestBody(
                 Required = bodyParameter.Required,
                 Content = consumes.ToDictionary(
                     k => k,
-                    v => new OpenApiMediaType
+                    _ => new OpenApiMediaType
                     {
                         Schema = bodyParameter.Schema
                     }),
diff --git a/src/Microsoft.OpenApi.Readers/V2/OpenApiSecuritySchemeDeserializer.cs b/src/Microsoft.OpenApi.Readers/V2/OpenApiSecuritySchemeDeserializer.cs
index 3cb9efe52..40596cac7 100644
--- a/src/Microsoft.OpenApi.Readers/V2/OpenApiSecuritySchemeDeserializer.cs
+++ b/src/Microsoft.OpenApi.Readers/V2/OpenApiSecuritySchemeDeserializer.cs
@@ -47,27 +47,27 @@ internal static partial class OpenApiV2Deserializer
                 {"name", (o, n) => o.Name = n.GetScalarValue()},
                 {"in", (o, n) => o.In = n.GetScalarValue().GetEnumFromDisplayName<ParameterLocation>()},
                 {
-                    "flow", (o, n) =>
+                    "flow", (_, n) =>
                     {
                         _flowValue = n.GetScalarValue();
                     }
                 },
                 {
                     "authorizationUrl",
-                    (o, n) =>
+                    (_, n) =>
                     {
                         _flow.AuthorizationUrl = new(n.GetScalarValue(), UriKind.RelativeOrAbsolute);
                     }
                 },
                 {
                     "tokenUrl",
-                    (o, n) =>
+                    (_, n) =>
                     {
                         _flow.TokenUrl = new(n.GetScalarValue(), UriKind.RelativeOrAbsolute);
                     }
                 },
                 {
-                    "scopes", (o, n) =>
+                    "scopes", (_, n) =>
                     {
                         _flow.Scopes = n.CreateSimpleMap(LoadString);
                     }
diff --git a/src/Microsoft.OpenApi.Readers/V3/OpenApiDocumentDeserializer.cs b/src/Microsoft.OpenApi.Readers/V3/OpenApiDocumentDeserializer.cs
index a4d16a429..edeca23ad 100644
--- a/src/Microsoft.OpenApi.Readers/V3/OpenApiDocumentDeserializer.cs
+++ b/src/Microsoft.OpenApi.Readers/V3/OpenApiDocumentDeserializer.cs
@@ -16,7 +16,7 @@ internal static partial class OpenApiV3Deserializer
         private static FixedFieldMap<OpenApiDocument> _openApiFixedFields = new()
         {
             {
-                "openapi", (o, n) =>
+                "openapi", (_, _) =>
                 {
                 } /* Version is valid field but we already parsed it */
             },
diff --git a/src/Microsoft.OpenApi/Models/OpenApiComponents.cs b/src/Microsoft.OpenApi/Models/OpenApiComponents.cs
index 31b7282f3..fb70a2965 100644
--- a/src/Microsoft.OpenApi/Models/OpenApiComponents.cs
+++ b/src/Microsoft.OpenApi/Models/OpenApiComponents.cs
@@ -109,7 +109,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                     writer.WriteOptionalMap(
                        OpenApiConstants.Schemas,
                        Schemas,
-                       (w, key, component) => {
+                       (w, _, component) => {
                            component.SerializeAsV3WithoutReference(w);
                            });
                 }
diff --git a/src/Microsoft.OpenApi/Models/OpenApiDocument.cs b/src/Microsoft.OpenApi/Models/OpenApiDocument.cs
index c2fa42890..27d8e3d25 100644
--- a/src/Microsoft.OpenApi/Models/OpenApiDocument.cs
+++ b/src/Microsoft.OpenApi/Models/OpenApiDocument.cs
@@ -173,7 +173,7 @@ public void SerializeAsV2(IOpenApiWriter writer)
                     writer.WriteOptionalMap(
                        OpenApiConstants.Definitions,
                        openApiSchemas,
-                       (w, key, component) =>
+                       (w, _, component) =>
                        {
                            component.SerializeAsV2WithoutReference(w);
                        });
diff --git a/src/Microsoft.OpenApi/Services/OpenApiFilterService.cs b/src/Microsoft.OpenApi/Services/OpenApiFilterService.cs
index 94bd995c4..fa1b9911e 100644
--- a/src/Microsoft.OpenApi/Services/OpenApiFilterService.cs
+++ b/src/Microsoft.OpenApi/Services/OpenApiFilterService.cs
@@ -304,12 +304,12 @@ private static void ValidateFilters(IDictionary<string, List<string>> requestUrl
         {
             if (operationIds == "*")
             {
-                return (url, operationType, operation) => true;  // All operations
+                return (_, _, _) => true;  // All operations
             }
             else
             {
                 var operationIdsArray = operationIds.Split(',');
-                return (url, operationType, operation) => operationIdsArray.Contains(operation.OperationId);
+                return (_, _, operation) => operationIdsArray.Contains(operation.OperationId);
             }
         }
 
@@ -319,11 +319,11 @@ private static void ValidateFilters(IDictionary<string, List<string>> requestUrl
             if (tagsArray.Length == 1)
             {
                 var regex = new Regex(tagsArray[0]);
-                return (url, operationType, operation) => operation.Tags.Any(tag => regex.IsMatch(tag.Name));
+                return (_, _, operation) => operation.Tags.Any(tag => regex.IsMatch(tag.Name));
             }
             else
             {
-                return (url, operationType, operation) => operation.Tags.Any(tag => tagsArray.Contains(tag.Name));
+                return (_, _, operation) => operation.Tags.Any(tag => tagsArray.Contains(tag.Name));
             }
         }
 
@@ -357,7 +357,7 @@ private static void ValidateFilters(IDictionary<string, List<string>> requestUrl
             }
 
             // predicate for matching url and operationTypes
-            return (path, operationType, operation) => operationTypes.Contains(operationType + path);
+            return (path, operationType, _) => operationTypes.Contains(operationType + path);
         }
 
         private static List<string> GetOperationTypes(IDictionary<OperationType, OpenApiOperation> openApiOperations, List<string> url, string path)
diff --git a/src/Microsoft.OpenApi/Writers/OpenApiWriterExtensions.cs b/src/Microsoft.OpenApi/Writers/OpenApiWriterExtensions.cs
index a0fa62eae..2ebb62071 100644
--- a/src/Microsoft.OpenApi/Writers/OpenApiWriterExtensions.cs
+++ b/src/Microsoft.OpenApi/Writers/OpenApiWriterExtensions.cs
@@ -367,7 +367,7 @@ private static void WriteMapInternal<T>(
             IDictionary<string, T> elements,
             Action<IOpenApiWriter, T> action)
         {
-            WriteMapInternal(writer, name, elements, (w, k, s) => action(w, s));
+            WriteMapInternal(writer, name, elements, (w, _, s) => action(w, s));
         }
 
         private static void WriteMapInternal<T>(
diff --git a/test/Microsoft.OpenApi.Readers.Tests/TestCustomExtension.cs b/test/Microsoft.OpenApi.Readers.Tests/TestCustomExtension.cs
index 50013739c..561cde431 100644
--- a/test/Microsoft.OpenApi.Readers.Tests/TestCustomExtension.cs
+++ b/test/Microsoft.OpenApi.Readers.Tests/TestCustomExtension.cs
@@ -27,7 +27,7 @@ public void ParseCustomExtension()
                 """;
             var settings = new OpenApiReaderSettings
             {
-                ExtensionParsers = { { "x-foo", (a,v) => {
+                ExtensionParsers = { { "x-foo", (a,_) => {
                         var fooNode = (OpenApiObject)a;
                         return new FooExtension
                         {
diff --git a/test/Microsoft.OpenApi.Tests/Validations/OpenApiReferenceValidationTests.cs b/test/Microsoft.OpenApi.Tests/Validations/OpenApiReferenceValidationTests.cs
index b145f9ab9..d2c4a1b70 100644
--- a/test/Microsoft.OpenApi.Tests/Validations/OpenApiReferenceValidationTests.cs
+++ b/test/Microsoft.OpenApi.Tests/Validations/OpenApiReferenceValidationTests.cs
@@ -152,7 +152,7 @@ public void UnresolvedSchemaReferencedShouldNotBeValidated()
 
     public class AlwaysFailRule<T> : ValidationRule<T> where T : IOpenApiElement
     {
-        public AlwaysFailRule() : base((c, t) => c.CreateError("x", "y"))
+        public AlwaysFailRule() : base((c, _) => c.CreateError("x", "y"))
         {
         }
     }