From dd7ab2f647fb2910371b48d1c7b7791eccd2b53a Mon Sep 17 00:00:00 2001
From: Nicolas Dorier <nicolas.dorier@gmail.com>
Date: Thu, 18 Jan 2024 09:31:35 +0900
Subject: [PATCH] Avoid exception storm when currency provider is initialized
 (#5668)

---
 BTCPayServer.Rating/CurrencyNameTable.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/BTCPayServer.Rating/CurrencyNameTable.cs b/BTCPayServer.Rating/CurrencyNameTable.cs
index f26279301..04560fc90 100644
--- a/BTCPayServer.Rating/CurrencyNameTable.cs
+++ b/BTCPayServer.Rating/CurrencyNameTable.cs
@@ -64,8 +64,17 @@ namespace BTCPayServer.Services.Rates
             {
                 if (_CurrencyProviders.Count == 0)
                 {
-                    foreach (var culture in CultureInfo.GetCultures(CultureTypes.AllCultures).Where(c => !c.IsNeutralCulture))
+                    foreach (var culture in CultureInfo.GetCultures(CultureTypes.AllCultures))
                     {
+                        // This avoid storms of exception throwing slowing up
+                        // startup and debugging sessions
+                        if (culture switch
+                        {
+                            { LCID: 0x007F or 0x0000 or 0x0c00 or 0x1000 } => true,
+                            { IsNeutralCulture : true } => true,
+                            _ => false
+                        })
+                            continue;
                         try
                         {
                             _CurrencyProviders.TryAdd(new RegionInfo(culture.LCID).ISOCurrencySymbol, culture);