From 3c3797168280f27b3ef91ce59a00e7a8c0fe9b0f Mon Sep 17 00:00:00 2001
From: omid ahmadpour <ahmadpooromid@gmail.com>
Date: Sun, 14 Aug 2022 11:36:21 +0200
Subject: [PATCH] Update README.md

add one guidline regarding best practice for returning null collection.
---
 README.md | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/README.md b/README.md
index 4e202b5..642b964 100644
--- a/README.md
+++ b/README.md
@@ -762,3 +762,31 @@ bool RequestIsValid(int id)
 ```
 Visual Studio shortcut : CRTL+R+G
 ```
+
+### Don't return null collection in your code:
+
+```
+public IEnumerable<User> GetUsers()
+{
+    if (SomeConditions())
+    {
+        return null;
+    }
+
+    return Data;
+}
+```
+
+👍 Do use Enumerable.Empty instead:
+
+```
+public IEnumerable<User> GetUsers()
+{
+    if (SomeConditions())
+    {
+        return Enumerable.Empty<User>();
+    }
+
+    return Data;
+}
+```