From 5aae99ed9ad3215e2cb6c969f82b7039eddec803 Mon Sep 17 00:00:00 2001
From: Zaafar <zaafar.tahir@gmail.com>
Date: Fri, 25 Dec 2020 04:54:25 -0500
Subject: [PATCH] added checks for ArgumentOutOfRangeException

---
 src/ImGui.NET/Util.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/ImGui.NET/Util.cs b/src/ImGui.NET/Util.cs
index 1753d30..f0f71d1 100644
--- a/src/ImGui.NET/Util.cs
+++ b/src/ImGui.NET/Util.cs
@@ -58,6 +58,11 @@ namespace ImGuiNET
 
         internal static int GetUtf8(string s, int start, int length, byte* utf8Bytes, int utf8ByteCount)
         {
+            if (start > s.Length - 1 || length > s.Length || start + length > s.Length)
+            {
+                throw new ArgumentOutOfRangeException();
+            }
+
             fixed (char* utf16Ptr = s)
             {
                 return Encoding.UTF8.GetBytes(utf16Ptr + start, length, utf8Bytes, utf8ByteCount);