FirstMatchCodeGroup Constructor

FirstMatchCodeGroup Constructor (IMembershipCondition, PolicyStatement)


Initializes a new instance of the FirstMatchCodeGroup class.

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

public FirstMatchCodeGroup(
	IMembershipCondition membershipCondition,
	PolicyStatement policy


Type: System.Security.Policy.IMembershipCondition

A membership condition that tests evidence to determine whether this code group applies policy.

Type: System.Security.Policy.PolicyStatement

The policy statement for the code group in the form of a permission set and attributes to grant code that matches the membership condition.

Exception Condition

The type of the membershipCondition parameter is not valid.


The type of the policy parameter is not valid.

This constructor creates a basic code group and should be called from the constructors of custom code groups. Child code groups can be added using the AddChild method.

The following code shows the use of the FirstMatchCodeGroup constructor. This code example is part of a larger example provided for FirstMatchCodeGroup class.

FileIOPermission rootFilePermissions =
    new FileIOPermission(PermissionState.None);
rootFilePermissions.AllLocalFiles = FileIOPermissionAccess.Read;

// Add a permission to a named permission set.
NamedPermissionSet namedPermissions =
    new NamedPermissionSet("RootPermissions");

// Create a PolicyStatement with exclusive rights to the policy.
PolicyStatement policy = new PolicyStatement(

// Create a FirstMatchCodeGroup with a membership condition that
// matches all code, and an exclusive policy.
FirstMatchCodeGroup codeGroup =
    new FirstMatchCodeGroup(
    new AllMembershipCondition(),

.NET Framework
Available since 1.1
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