From 9d6f59a795fd95190ffcf7040b922d9e7c8e9019 Mon Sep 17 00:00:00 2001
From: Christoph Ruegg <git@cdrnet.ch>
Date: Fri, 5 Jan 2018 23:04:53 +0100
Subject: [PATCH] MatrixStorage: more reasonable GetHashCode #534

---
 src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs b/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
index 25297625..3195759e 100644
--- a/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
@@ -190,8 +190,13 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             {
                 for (var i = 0; i < hashNum; i++)
                 {
-                    var col = i%ColumnCount;
-                    var row = (i - col)%RowCount;
+#if PORTABLE || NETSTANDARD
+                    int col = i%ColumnCount;
+                    int row = i/ColumnCount;
+#else
+                    int col;
+                    int row = Math.DivRem(i, ColumnCount, out col);
+#endif
                     hash = hash*31 + At(row, col).GetHashCode();
                 }
             }