# System.Runtime.Versioning

``` diff
 namespace System.Runtime.Versioning {
-    public sealed class MinimumOSPlatformAttribute : OSPlatformAttribute {
 {
-        public MinimumOSPlatformAttribute(string platformName);

-    }
-    public sealed class ObsoletedInOSPlatformAttribute : OSPlatformAttribute {
 {
-        public ObsoletedInOSPlatformAttribute(string platformName);

-        public ObsoletedInOSPlatformAttribute(string platformName, string message);

-        public string Message { get; }

-        public string Url { get; set; }

-    }
-    public sealed class RemovedInOSPlatformAttribute : OSPlatformAttribute {
 {
-        public RemovedInOSPlatformAttribute(string platformName);

-    }
+    public sealed class SupportedOSPlatformAttribute : OSPlatformAttribute {
+        public SupportedOSPlatformAttribute(string platformName);
+    }
+    public sealed class UnsupportedOSPlatformAttribute : OSPlatformAttribute {
+        public UnsupportedOSPlatformAttribute(string platformName);
+    }
 }
```

