From e293cc3f8edd1fccabeece94e07250cff50c8d22 Mon Sep 17 00:00:00 2001
From: hikari <hikarin522@outlook.jp>
Date: Thu, 9 Dec 2021 19:20:41 +0900
Subject: [PATCH] Update SystemRandomSource.cs

Fixed a seed value issue in the .NET Framework.
---
 src/Numerics/Random/SystemRandomSource.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Numerics/Random/SystemRandomSource.cs b/src/Numerics/Random/SystemRandomSource.cs
index 72e4d096..a0fd1038 100644
--- a/src/Numerics/Random/SystemRandomSource.cs
+++ b/src/Numerics/Random/SystemRandomSource.cs
@@ -51,7 +51,11 @@ namespace MathNet.Numerics.Random
         /// </summary>
         public SystemRandomSource()
         {
+#if NETCOREAPP
             _random = new System.Random();
+#else
+            _random = new System.Random(RandomSeed.Robust());
+#endif
         }
 
         /// <summary>
@@ -60,7 +64,11 @@ namespace MathNet.Numerics.Random
         /// <param name="threadSafe">if set to <c>true</c> , the class is thread safe.</param>
         public SystemRandomSource(bool threadSafe) : base(threadSafe)
         {
+#if NETCOREAPP
             _random = new System.Random();
+#else
+            _random = new System.Random(RandomSeed.Robust());
+#endif
         }
 
         /// <summary>