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Asked: 2026-05-15T09:58:03+00:00

I have a class that inherits from Exception. In .NET 4, I started receiving

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I have a class that inherits from Exception. In .NET 4, I started receiving a runtime error:

Inheritance security rules violated
while overriding member: MyBusinessException.GetObjectData(System.Runtime.Serialization.SerializationInfo, System.Runtime.Serialization.StreamingContext)’. Security
accessibility of the overriding method
must match the security accessibility
of the method being overriden.

I think the issue is caused by the fact that I am overriding GetObjectData.

I know one answer for resolving the issue is to set the SecurityRuleSet:

[assembly: SecurityRules(SecurityRuleSet.Level1)]

This is not an acceptable answer, I’d like to know how to fix the issue without having to relax the default security rules in .NET 4.

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1 Answer

  1. Editorial Team

    Mark GetObjectData with SecurityCriticalAttribute, because it’s applied to Exception.GetObjectData. An overridden member should have the same security accessibility (Critical, Safe Critical or Transparent).

    Read Security Changes in the .NET Framework 4 and Security Transparent Code, Level 2 from MSDN for more information.

    To avoid all potential security runtime exceptions, enable Code Analysis with the Security rule set. You’ll get static analysis warnings that might correspond to runtime errors.

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