fix csharp refer to apiinvoker

Author: wing328

bin/all-petstore.sh

@@ -25,6 +25,7 @@ cd $APP_DIR
 ./bin/jaxrs-petstore-server.sh
 ./bin/java-petstore.sh
 ./bin/qt5-petstore.sh
+./bin/perl-petstore.sh
 ./bin/php-petstore.sh
 ./bin/python-petstore.sh
 ./bin/retrofit-petstore.sh

modules/swagger-codegen/src/main/resources/csharp/api.mustache

@@ -164,7 +164,7 @@ namespace {{package}} {
       if (((int)response.StatusCode) >= 400) {
         throw new ApiException ((int)response.StatusCode, "Error calling {{nickname}}: " + response.Content, response.Content);
       }
-      {{#returnType}}return ({{{returnType}}}) ApiInvoker.Deserialize(response.Content, typeof({{{returnType}}}));{{/returnType}}{{^returnType}}
+      {{#returnType}}return ({{{returnType}}}) apiClient.Deserialize(response.Content, typeof({{{returnType}}}));{{/returnType}}{{^returnType}}
       return;{{/returnType}}
     }
     {{/operation}}