From fbf4d0e41922fdb26f92f35039f3f4032656f725 Mon Sep 17 00:00:00 2001
From: Artyom <artem-dudarev@users.noreply.github.com>
Date: Tue, 15 Dec 2015 10:51:04 +0200
Subject: [PATCH] Fixed ArgumentOutOfRangeException

If the list is empty you get the ArgumentOutOfRangeException when calling flattenString.Remove(flattenString.Length - 1).
Also using a StringBuilder is the prefered way to concatenate strings in a loop.
---
 .../src/main/resources/csharp/ApiClient.mustache         | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/modules/swagger-codegen/src/main/resources/csharp/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/csharp/ApiClient.mustache
index 707ce9eb560..1ab3c939e4c 100644
--- a/modules/swagger-codegen/src/main/resources/csharp/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/csharp/ApiClient.mustache
@@ -163,13 +163,14 @@ namespace {{packageName}}.Client
                 return ((DateTime)obj).ToString (Configuration.DateTimeFormat);
             else if (obj is IList)
             {
-                string flattenString = "";
-                string separator = ",";
+                var flattenedString = new StringBuilder();
                 foreach (var param in (IList)obj)
                 {
-                    flattenString += param.ToString() + separator;
+                    if (flattenedString.Length > 0)
+                        flattenedString.Append(",");
+                    flattenedString.Append(param);
                 }
-                return flattenString.Remove(flattenString.Length - 1);;
+                return flattenedString.ToString();
             }
             else
                 return Convert.ToString (obj);