From be912fdef9ef95b2d5a4bebbcd05ed0b091e8223 Mon Sep 17 00:00:00 2001
From: Igor <igorocampos@gmail.com>
Date: Fri, 7 Oct 2022 16:29:27 -0300
Subject: [PATCH] Added null check to string parameter on BaseEmitter Print
 method

---
 ESCPOS_NET/Emitters/BaseCommandEmitter/PrintCommands.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ESCPOS_NET/Emitters/BaseCommandEmitter/PrintCommands.cs b/ESCPOS_NET/Emitters/BaseCommandEmitter/PrintCommands.cs
index 725a300..cd7b76e 100644
--- a/ESCPOS_NET/Emitters/BaseCommandEmitter/PrintCommands.cs
+++ b/ESCPOS_NET/Emitters/BaseCommandEmitter/PrintCommands.cs
@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 using ESCPOS_NET.Emitters.BaseCommandValues;
 
 namespace ESCPOS_NET.Emitters
@@ -8,6 +9,9 @@ public abstract partial class BaseCommandEmitter : ICommandEmitter
         /* Printing Commands */
         public virtual byte[] Print(string data)
         {
+            if (data == null)
+                throw new ArgumentNullException(nameof(data));
+
             // Fix OSX or Windows-style newlines
             data = data.Replace("\r\n", "\n");
             data = data.Replace("\r", "\n");