diff --git a/blazorbootstrap/Components/Markdown/Markdown.razor.cs b/blazorbootstrap/Components/Markdown/Markdown.razor.cs
index df8a60c45..c80a84b49 100644
--- a/blazorbootstrap/Components/Markdown/Markdown.razor.cs
+++ b/blazorbootstrap/Components/Markdown/Markdown.razor.cs
@@ -608,7 +608,7 @@ private List<string> GetLines()
                 inputs.RemoveAt(0);
 
             // remove last blank line
-            if (string.IsNullOrWhiteSpace(inputs[^1]))
+            if (inputs.Count > 0 && string.IsNullOrWhiteSpace(inputs[^1]))
                 inputs.RemoveAt(inputs.Count - 1);
         }