diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ProcessUtils.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ProcessUtils.java
index 893cf31332e..8a6be94b934 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ProcessUtils.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ProcessUtils.java
@@ -9,6 +9,7 @@ import org.openapitools.codegen.model.ModelMap;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 public class ProcessUtils {
@@ -306,7 +307,7 @@ public class ProcessUtils {
         final Map<String, SecurityScheme> securitySchemes = getSecuritySchemes(openAPI);
         if (securitySchemes != null) {
             for (Map.Entry<String, SecurityScheme> scheme : securitySchemes.entrySet()) {
-                if (SecurityScheme.Type.HTTP.equals(scheme.getValue().getType()) && "bearer".equals(scheme.getValue().getScheme())) {
+                if (SecurityScheme.Type.HTTP.equals(scheme.getValue().getType()) && "bearer".equals(scheme.getValue().getScheme().strip().toLowerCase(Locale.ROOT))) {
                     return true;
                 }
             }
@@ -325,7 +326,7 @@ public class ProcessUtils {
         final Map<String, SecurityScheme> securitySchemes = getSecuritySchemes(openAPI);
         if (securitySchemes != null) {
             for (Map.Entry<String, SecurityScheme> scheme : securitySchemes.entrySet()) {
-                if (SecurityScheme.Type.HTTP.equals(scheme.getValue().getType()) && "basic".equals(scheme.getValue().getScheme())) {
+                if (SecurityScheme.Type.HTTP.equals(scheme.getValue().getType()) && "basic".equals(scheme.getValue().getScheme().strip().toLowerCase(Locale.ROOT))) {
                     return true;
                 }
             }
@@ -344,7 +345,7 @@ public class ProcessUtils {
         final Map<String, SecurityScheme> securitySchemes = getSecuritySchemes(openAPI);
         if (securitySchemes != null) {
             for (Map.Entry<String, SecurityScheme> scheme : securitySchemes.entrySet()) {
-                if (SecurityScheme.Type.HTTP.equals(scheme.getValue().getType()) && "signature".equals(scheme.getValue().getScheme())) {
+                if (SecurityScheme.Type.HTTP.equals(scheme.getValue().getType()) && "signature".equals(scheme.getValue().getScheme().strip().toLowerCase(Locale.ROOT))) {
                     return true;
                 }
             }
diff --git a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/api.mustache b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/api.mustache
index 66723d8161e..46bdc6e7bc1 100644
--- a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/api.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/api.mustache
@@ -468,9 +468,9 @@ namespace {{packageName}}.{{apiPackage}}
                     {{#authMethods}}
                     {{#-first}}
                     List<TokenBase> tokenBaseLocalVars = new List<TokenBase>();
-                    ApiKeyToken apiKeyTokenLocalVar;
                     {{/-first}}
                     {{#isApiKey}}
+                    ApiKeyToken apiKeyTokenLocalVar;
                     apiKeyTokenLocalVar = (ApiKeyToken) await ApiKeyProvider.GetAsync(cancellationToken).ConfigureAwait(false);
                     tokenBaseLocalVars.Add(apiKeyTokenLocalVar);{{#isKeyInHeader}}
                     apiKeyTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, "{{keyParamName}}");