Marking Memory struct as readonly, fixing corefx#23809 (#14684)

diff --git a/src/mscorlib/shared/System/Memory.cs b/src/mscorlib/shared/System/Memory.cs
index 5011510..ecb33e8 100644 (file)
--- 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 (file)
--- 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.