FieldInfo.IsSecurityCritical Property

Definition

Namespace:

System.Reflection

Assembly:

System.Runtime.dll

Source:

FieldInfo.cs

Gets a value that indicates whether the current field is security-critical or security-safe-critical at the current trust level.

public:
 virtual property bool IsSecurityCritical { bool get(); };

public virtual bool IsSecurityCritical { get; }

member this.IsSecurityCritical : bool

Public Overridable ReadOnly Property IsSecurityCritical As Boolean

Property Value

Boolean

true if the current field is security-critical or security-safe-critical at the current trust level; false if it is transparent.

Remarks

The IsSecurityCritical, IsSecuritySafeCritical, and IsSecurityTransparent properties report the transparency level of the field at its current trust level, as determined by the common language runtime (CLR). The combinations of these properties are shown in the following table:

Security level	IsSecurityCritical	IsSecuritySafeCritical	IsSecurityTransparent
Critical	true	false	false
Safe critical	true	true	false
Transparent	false	false	true

Using these properties is much simpler than examining the security annotations of an assembly and its types and members, checking the current trust level, and attempting to duplicate the runtime's rules.

Important

For partial-trust assemblies, the value of this property depends on the current trust level of the assembly. If the assembly is loaded into a partially trusted application domain (for example, into a sandboxed application domain), then the runtime ignores the security annotations of the assembly. The assembly and all its types are treated as transparent. The runtime pays attention to the security annotations of a partial-trust assembly only when that assembly is loaded into a fully trusted application domain (for example, into the default application domain of a desktop application). By contrast, a trusted assembly (that is, a strong-named assembly that is installed in the global assembly cache) is always loaded with full trust regardless of the trust level of the application domain, so its current trust level is always fully trusted. You can determine the current trust levels of assemblies and application domains by using the Assembly.IsFullyTrusted and AppDomain.IsFullyTrusted properties.

For more information about reflection and transparency, see Security Considerations for Reflection. For information about transparency, see Security Changes.

See also

• IsSecuritySafeCritical
• IsSecurityTransparent