public override bool IsSubsetOf(IPermission target)
{
// Pattern suggested by security engine
if (target == null)
{
return(access == NetworkInformationAccess.None);
}
NetworkInformationPermission other = target as NetworkInformationPermission;
if (other == null)
{
throw new ArgumentException(SR.GetString(SR.net_perm_target), "target");
}
if (unrestricted && !other.IsUnrestricted())
{
return(false);
}
else if ((access & other.access) == access)
{
return(true);
}
return(false);
}
public override bool IsSubsetOf(IPermission target)
{
if (target == null)
{
return(this.access == NetworkInformationAccess.None);
}
NetworkInformationPermission permission = target as NetworkInformationPermission;
if (permission == null)
{
throw new ArgumentException(SR.GetString("net_perm_target"), "target");
}
if (this.unrestricted && !permission.IsUnrestricted())
{
return(false);
}
return((this.access & permission.access) == this.access);
}
public override IPermission Union(IPermission target)
{
if (target == null)
{
return(this.Copy());
}
NetworkInformationPermission permission = target as NetworkInformationPermission;
if (permission == null)
{
throw new ArgumentException(SR.GetString("net_perm_target"), "target");
}
if (!this.unrestricted && !permission.IsUnrestricted())
{
return(new NetworkInformationPermission(this.access | permission.access));
}
return(new NetworkInformationPermission(true));
}
public override IPermission Union(IPermission target)
{
if (target == null)
{
return(this.Copy());
}
NetworkInformationPermission other = target as NetworkInformationPermission;
if (other == null)
{
throw new ArgumentException(SR.GetString(SR.net_perm_target), "target");
}
if (unrestricted || other.IsUnrestricted())
{
return(new NetworkInformationPermission(true));
}
return(new NetworkInformationPermission(this.access | other.access));
}
public static void CreatePermission()
{
//<Snippet6>
//<Snippet5>
//<Snippet2>
//<Snippet1>
System.Net.NetworkInformation.NetworkInformationPermission unrestricted =
new System.Net.NetworkInformation.NetworkInformationPermission(
System.Security.Permissions.PermissionState.Unrestricted);
//</Snippet1>
Console.WriteLine("Is unrestricted? " + unrestricted.IsUnrestricted());
//</Snippet2>
//<Snippet4>
//<Snippet3>
System.Net.NetworkInformation.NetworkInformationPermission read =
new System.Net.NetworkInformation.NetworkInformationPermission(
System.Net.NetworkInformation.NetworkInformationAccess.Read);
//</Snippet3>
System.Net.NetworkInformation.NetworkInformationPermission copyPermission =
(System.Net.NetworkInformation.NetworkInformationPermission)read.Copy();
//</Snippet4>
System.Net.NetworkInformation.NetworkInformationPermission unionPermission =
(System.Net.NetworkInformation.NetworkInformationPermission)read.Union(unrestricted);
Console.WriteLine("Is subset?" + read.IsSubsetOf(unionPermission));
//</Snippet5>
System.Net.NetworkInformation.NetworkInformationPermission intersectPermission =
(System.Net.NetworkInformation.NetworkInformationPermission)read.Intersect(unrestricted);
//</Snippet6>
//<Snippet7>
System.Net.NetworkInformation.NetworkInformationPermission permission =
new System.Net.NetworkInformation.NetworkInformationPermission(
System.Security.Permissions.PermissionState.None);
permission.AddPermission(
System.Net.NetworkInformation.NetworkInformationAccess.Read);
Console.WriteLine("Access is {0}", permission.Access);
//</Snippet7>
}
