diff --git a/src/main/resources/handlebars/csharp/modelEnum.mustache b/src/main/resources/handlebars/csharp/modelEnum.mustache
index 2993849ecf..5037bbb6bc 100644
--- a/src/main/resources/handlebars/csharp/modelEnum.mustache
+++ b/src/main/resources/handlebars/csharp/modelEnum.mustache
@@ -14,6 +14,6 @@
         /// Enum {{name}} for value: {{{value}}}
         /// </summary>
         {{#isString}}[EnumMember(Value = "{{{value}}}")]{{/isString}}
-        {{name}}{{^isString}} = {{{value}}}{{/isString}}{{#isString}} = {{@index}}{{/isString}}{{^@last}},
+        {{name}}{{^isString}} = {{{value}}}{{/isString}}{{#isString}} = {{@index_1}}{{/isString}}{{^@last}},
         {{/@last}}{{/enumVars}}{{/allowableValues}}
     }{{! NOTE: This model's enumVars is modified to look like CodegenProperty}}
diff --git a/src/main/resources/handlebars/csharp/modelInnerEnum.mustache b/src/main/resources/handlebars/csharp/modelInnerEnum.mustache
index 2d8626b54e..477be16c8d 100644
--- a/src/main/resources/handlebars/csharp/modelInnerEnum.mustache
+++ b/src/main/resources/handlebars/csharp/modelInnerEnum.mustache
@@ -15,7 +15,7 @@
             /// Enum {{name}} for value: {{{value}}}
             /// </summary>
             {{#isString}}[EnumMember(Value = "{{{value}}}")]{{/isString}}
-            {{name}}{{^isString}} = {{{value}}}{{/isString}}{{#isString}} = {{@index}}{{/isString}}{{^@last}},
+            {{name}}{{^isString}} = {{{value}}}{{/isString}}{{#isString}} = {{@index_1}}{{/isString}}{{^@last}},
             {{/@last}}{{/enumVars}}{{/allowableValues}}
         }
         {{/isContainer}}