diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java
index 960a6ae7f33..a9c7381ec4b 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java
@@ -292,7 +292,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         // {{sourceFolder}}
         if (additionalProperties.containsKey(CodegenConstants.SOURCE_FOLDER)) {
             setSourceFolder((String) additionalProperties.get(CodegenConstants.SOURCE_FOLDER));
-            
+
             // TODO: Move to its own option when a parameter for 'testFolder' is added.
             setTestFolder((String) additionalProperties.get(CodegenConstants.SOURCE_FOLDER));
         } else {
@@ -472,7 +472,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         if ("string?".equals(dataType)){
             enumVars.forEach((enumVar) -> {
                 enumVar.put("isString", true);
-            }); 
+            });
         }
 
         return enumVars;
@@ -493,7 +493,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         for (Map.Entry<String, ModelsMap> entry : models.entrySet()) {
             CodegenModel model = ModelUtils.getModelByName(entry.getKey(), models);
             if (model.isEnum) {
-                enumRefs.put(entry.getKey(), model);
+                enumRefs.put(model.getClassname(), model);
             }
         }
 
@@ -1172,7 +1172,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
     public void setSourceFolder(String sourceFolder) {
         this.sourceFolder = sourceFolder;
     }
-    
+
     public void setTestFolder(String testFolder) {
         this.testFolder = testFolder;
     }