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SecurityRuleSet Enumeration

.NET Framework 4.6 and 4.5

Identifies the set of security rules the common language runtime should enforce for an assembly.

Namespace:  System.Security
Assembly:  mscorlib (in mscorlib.dll)

public enum SecurityRuleSet

Member nameDescription
Level1Indicates that the runtime will enforce level 1 (.NET Framework version 2.0) transparency rules.
Level2Indicates that the runtime will enforce level 2 transparency rules.
NoneUnsupported. Using this value results in a FileLoadException being thrown.

This enumeration indicates which set of security rules the common language runtime should enforce for an assembly. For example, an assembly that is marked with [SecurityRules(SecurityRuleSet.Level1)] uses the .NET Framework version 2.0 transparency rules, where public security-critical types and members are treated as security-safe-critical outside the assembly. This requires security-critical types and members to perform a link demand for full trust to enforce security-critical behavior when they are accessed by external callers. Typically, level 1 rules should be used only for compatibility, such as for .NET Framework 2.0 assemblies. By default, .NET Framework 2.0 assemblies become level 2 assemblies when they are recompiled for the .NET Framework 4. To compile these assemblies as level 1, you must mark them explicitly as level 1. For more information about level 1 behavior, see Security-Transparent Code, Level 1. For information about level 2 behavior, see Security-Transparent Code, Level 2.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4
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