Transparent method 'Buffer..ctor(System.Int32)' references security critical method 'System.Runtime.InteropServices.Marshal.AllocCoTaskMem(System.Int32)'. In order for this reference to be allowed under the security transparency rules, either 'Buffer..ctor(System.Int32)' must become security critical or safe-critical, or 'System.Runtime.InteropServices.Marshal.AllocCoTaskMem(System.Int32)' become security safe-critical or transparent. Critical method 'Buffer.Dispose()' is overriding transparent or safe critical method 'System.IDisposable.Dispose()' in violation of method override rules. 'Buffer.Dispose()' must become transparent or safe-critical in order to override a transparent or safe-critical virtual method or implement a transparent or safe-critical interface method. Transparent method 'Buffer.Dispose()' references security critical method 'Buffer.Dispose(System.Boolean)'. In order for this reference to be allowed under the security transparency rules, either 'Buffer.Dispose()' must become security critical or safe-critical, or 'Buffer.Dispose(System.Boolean)' become security safe-critical or transparent. Transparent method 'Buffer.Dispose(System.Boolean)' references security critical method 'System.Runtime.InteropServices.Marshal.FreeCoTaskMem(System.IntPtr)'. In order for this reference to be allowed under the security transparency rules, either 'Buffer.Dispose(System.Boolean)' must become security critical or safe-critical, or 'System.Runtime.InteropServices.Marshal.FreeCoTaskMem(System.IntPtr)' become security safe-critical or transparent. Critical method 'Buffer.Finalize()' is overriding transparent or safe critical method 'System.Object.Finalize()' in violation of method override rules. 'Buffer.Finalize()' must become transparent or safe-critical in order to override a transparent or safe-critical virtual method or implement a transparent or safe-critical interface method. Transparent method 'Buffer.Finalize()' references security critical method 'Buffer.Dispose(System.Boolean)'. In order for this reference to be allowed under the security transparency rules, either 'Buffer.Finalize()' must become security critical or safe-critical, or 'Buffer.Dispose(System.Boolean)' become security safe-critical or transparent. 'Buffer.get_NativePointer()' is protected with a LinkDemand for 'SecurityPermissionAttribute'. In the level 2 security rule set, it should be protected by being security critical instead. Remove the LinkDemand and mark 'Buffer.get_NativePointer()' security critical. Transparent method 'Buffer.get_NativePointer()' is protected with a LinkDemand for 'SecurityPermissionAttribute'. Remove this LinkDemand, or make the method security critical or safe-critical. Transparency visibility must be preserved between overriding methods and the methods that are being overridden. If the virtual method being overridden or interface method being implemented is security safe-critical or security transparent, then the overriding method must also be either security safe-critical or security transparent. Similarly, if the method being overridden is security critical, the overriding method must be security critical. LinkDemands are deprecated in the level 2 security rule set. Instead of using LinkDemands to enforce JIT time security, SecurityCritical methods, types, and fields should be used instead. Transparent code cannot refer to security critical methods, types, or fields. At runtime these references will result in MemberAccessExceptions or TypeLoadExceptions. Security transparent code should not be responsible for verifying the security of an operation, and therefore should not be protected from partial trust callers with LinkDemands.