From 66b3785b718ed3291b5c50078a39a5727158d519 Mon Sep 17 00:00:00 2001
From: Ahson Khan <ahkha@microsoft.com>
Date: Wed, 25 Oct 2017 09:44:00 -0700
Subject: [PATCH] Marking Memory struct as readonly, fixing corefx#23809
 (#14684)

---
 src/mscorlib/shared/System/Memory.cs         | 2 +-
 src/mscorlib/shared/System/ReadOnlyMemory.cs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mscorlib/shared/System/Memory.cs b/src/mscorlib/shared/System/Memory.cs
index 5011510..ecb33e8 100644
--- a/src/mscorlib/shared/System/Memory.cs
+++ b/src/mscorlib/shared/System/Memory.cs
@@ -14,7 +14,7 @@ namespace System
 {
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
     [DebuggerTypeProxy(typeof(MemoryDebugView<>))]
-    public struct Memory<T>
+    public readonly struct Memory<T>
     {
         // NOTE: With the current implementation, Memory<T> and ReadOnlyMemory<T> must have the same layout,
         // as code uses Unsafe.As to cast between them.
diff --git a/src/mscorlib/shared/System/ReadOnlyMemory.cs b/src/mscorlib/shared/System/ReadOnlyMemory.cs
index 2216902..c2ba4ab 100644
--- a/src/mscorlib/shared/System/ReadOnlyMemory.cs
+++ b/src/mscorlib/shared/System/ReadOnlyMemory.cs
@@ -14,7 +14,7 @@ namespace System
 {
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
     [DebuggerTypeProxy(typeof(MemoryDebugView<>))]
-    public struct ReadOnlyMemory<T>
+    public readonly struct ReadOnlyMemory<T>
     {
         // NOTE: With the current implementation, Memory<T> and ReadOnlyMemory<T> must have the same layout,
         // as code uses Unsafe.As to cast between them.
-- 
2.7.4