1 files changed, 32 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/Security/SecurityTreatAsSafeAttribute.cs b/src/mscorlib/shared/System/Security/SecurityTreatAsSafeAttribute.cs
new file mode 100644
index 0000000000..7a95122bf0
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+++ b/src/mscorlib/shared/System/Security/SecurityTreatAsSafeAttribute.cs
@@ -0,0 +1,32 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System.Security
+{
+    // SecurityTreatAsSafeAttribute:
+    // Indicates that the code may contain violations to the security critical rules (e.g. transitions from
+    //      critical to non-public transparent, transparent to non-public critical, etc.), has been audited for
+    //      security concerns and is considered security clean.
+    // At assembly-scope, all rule checks will be suppressed within the assembly and for calls made against the assembly.
+    // At type-scope, all rule checks will be suppressed for members within the type and for calls made against the type.
+    // At member level (e.g. field and method) the code will be treated as public - i.e. no rule checks for the members.
+
+    [AttributeUsage(AttributeTargets.Assembly |
+                    AttributeTargets.Class |
+                    AttributeTargets.Struct |
+                    AttributeTargets.Enum |
+                    AttributeTargets.Constructor |
+                    AttributeTargets.Method |
+                    AttributeTargets.Field |
+                    AttributeTargets.Interface |
+                    AttributeTargets.Delegate,
+        AllowMultiple = false,
+        Inherited = false)]
+    [Obsolete("SecurityTreatAsSafe is only used for .NET 2.0 transparency compatibility.  Please use the SecuritySafeCriticalAttribute instead.")]
+    public sealed class SecurityTreatAsSafeAttribute : Attribute
+    {
+        public SecurityTreatAsSafeAttribute() { }
+    }
+}
+