From dad216fc0cbcbd732450a73fe189dd857d5bee32 Mon Sep 17 00:00:00 2001
From: sveinungf <ikonage@gmail.com>
Date: Sat, 20 Jan 2024 21:58:38 +0100
Subject: [PATCH] Assign null string value in DataCell

---
 SpreadCheetah/DataCell.cs          | 2 +-
 SpreadCheetah/SpreadsheetBuffer.cs | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/SpreadCheetah/DataCell.cs b/SpreadCheetah/DataCell.cs
index a9adbeb4..d14bb2b1 100644
--- a/SpreadCheetah/DataCell.cs
+++ b/SpreadCheetah/DataCell.cs
@@ -17,7 +17,7 @@ public readonly record struct DataCell
     /// </summary>
     public DataCell(string? value)
     {
-        StringValue = value ?? string.Empty;
+        StringValue = value;
         Type = value != null ? CellWriterType.String : CellWriterType.Null;
     }
 
diff --git a/SpreadCheetah/SpreadsheetBuffer.cs b/SpreadCheetah/SpreadsheetBuffer.cs
index ea9a43ad..35eed59e 100644
--- a/SpreadCheetah/SpreadsheetBuffer.cs
+++ b/SpreadCheetah/SpreadsheetBuffer.cs
@@ -129,6 +129,9 @@ public bool AppendFormatted<T>(T value)
 
         public bool AppendFormatted(string? value)
         {
+            if (value is null)
+                return true;
+
             if (XmlUtility.TryXmlEncodeToUtf8(value.AsSpan(), GetSpan(), out var bytesWritten))
             {
                 _pos += bytesWritten;