From 2a1cd4fda8a4a8e649910d16b4dfa1ce7ae63543 Mon Sep 17 00:00:00 2001
From: chai <215380520@qq.com>
Date: Fri, 12 May 2023 09:24:40 +0800
Subject: *misc

---
 .../src/CsvHelper/EnumerableExtensions.cs          | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 ThirdParty/CsvHelper-master/src/CsvHelper/EnumerableExtensions.cs

(limited to 'ThirdParty/CsvHelper-master/src/CsvHelper/EnumerableExtensions.cs')

diff --git a/ThirdParty/CsvHelper-master/src/CsvHelper/EnumerableExtensions.cs b/ThirdParty/CsvHelper-master/src/CsvHelper/EnumerableExtensions.cs
new file mode 100644
index 0000000..a15b20b
--- /dev/null
+++ b/ThirdParty/CsvHelper-master/src/CsvHelper/EnumerableExtensions.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CsvHelper
+{
+	internal static class EnumerableExtensions
+	{
+#if !NET45
+		public static async Task<T?> FirstOrDefaultAsync<T>(this IAsyncEnumerable<T> collection)
+		{
+			await foreach (var o in collection.ConfigureAwait(false))
+			{
+				if (o != null)
+				{
+					return o;
+				}
+			}
+
+			return default(T);
+		}
+#endif
+	}
+}
-- 
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