1 files changed, 18 insertions, 1 deletions
diff --git a/src/System.Private.CoreLib/shared/System/Security/SecureString.cs b/src/System.Private.CoreLib/shared/System/Security/SecureString.cs
index 22f15acca..cdee9c907 100644
--- a/src/System.Private.CoreLib/shared/System/Security/SecureString.cs
+++ b/src/System.Private.CoreLib/shared/System/Security/SecureString.cs
@@ -139,7 +139,7 @@ namespace System.Security
                 {
                     throw new ArgumentOutOfRangeException(nameof(index), SR.ArgumentOutOfRange_IndexString);
                 }
-                Debug.Assert(index <= Int32.MaxValue / sizeof(char));
+                Debug.Assert(index <= int.MaxValue / sizeof(char));
 
                 EnsureNotDisposed();
                 EnsureNotReadOnly();
@@ -156,6 +156,23 @@ namespace System.Security
             }
         }
 
+        private void EnsureNotDisposed()
+        {
+            if (_buffer == null)
+            {
+                throw new ObjectDisposedException(GetType().Name);
+            }
+        }
+
+        internal IntPtr MarshalToBSTR()
+        {
+            lock (_methodLock)
+            {
+                EnsureNotDisposed();
+                return MarshalToBSTRCore();
+            }
+        }
+
         internal unsafe IntPtr MarshalToString(bool globalAlloc, bool unicode)
         {
             lock (_methodLock)