From 1ef4215f9cfea6a511ed32ae1c8c84e87908aae8 Mon Sep 17 00:00:00 2001
From: Daniel Chalmers <daniel.chalmers@outlook.com>
Date: Thu, 4 Jul 2024 01:59:36 -0500
Subject: [PATCH] MudCollapse: Fix `aria-expanded` value (#9303)

---
 src/MudBlazor/Components/Collapse/MudCollapse.razor | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/MudBlazor/Components/Collapse/MudCollapse.razor b/src/MudBlazor/Components/Collapse/MudCollapse.razor
index fc461319f61d..b29107881cdd 100644
--- a/src/MudBlazor/Components/Collapse/MudCollapse.razor
+++ b/src/MudBlazor/Components/Collapse/MudCollapse.razor
@@ -1,8 +1,8 @@
 @namespace MudBlazor
 @inherits MudComponentBase
-@using System.Globalization;
+@using System.Globalization
 
-<div aria-expanded="@Expanded" @onanimationend="EventUtil.AsNonRenderingEventHandler(AnimationEndAsync)"
+<div aria-expanded="@Expanded.ToString().ToLowerInvariant()" @onanimationend="EventUtil.AsNonRenderingEventHandler(AnimationEndAsync)"
      @attributes="UserAttributes" class="@Classname" style="@Stylename">
     <div @ref="_wrapper" class="mud-collapse-wrapper">
         <div class="mud-collapse-wrapper-inner">