Allows security actions for System.Security.Permissions.EnvironmentPermission to be applied to code using declarative security. This class cannot be inherited.
See Also: EnvironmentPermissionAttribute Members
Syntax
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class EnvironmentPermissionAttribute : CodeAccessSecurityAttribute
Remarks
The scope of the declaration that is allowed depends on the System.Security.Permissions.SecurityAction that is used.
The security information declared by a security attribute is stored in the metadata of the attribute target and is accessed by the system at run time. Security attributes are used only for declarative security. For imperative security, use the corresponding permission class.
Environment variable names are case-insensitive. Multiple environment variable names are specified by separating the names using System.IO.Path.PathSeparator.
Thread Safety
Example
The following example shows a declarative request for the ability to read the specified environment variables. The SecurityAction.RequestMinimum security action indicates that this is the minimum permission required for the target assembly to be able to execute.
[assembly:EnvironmentPermissionAttribute(SecurityAction.RequestMinimum, Read="COMPUTERNAME;USERNAME;USERDOMAIN")]
The following example shows how to demand that the calling code has unrestricted access to all environment variables. Demands are typically made in managed libraries to protect methods or classes from malicious code.
[EnvironmentPermissionAttribute(SecurityAction.Demand, Unrestricted=true)]
Requirements
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0