This method uses System.Security.Permissions.SecurityAction.LinkDemand to prevent it from being called from untrusted code; only the immediate caller is required to have System.Security.Permissions.SecurityPermissionAttribute.UnmanagedCode permission. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand.

This member also makes a link demand for the ECMA public key, which is not a valid cryptographic key but a pseudo key. Within the .NET Framework the link demand for the ECMA pseudo key is automatically converted to a link demand for the Microsoft public key. The security exception is based on the Microsoft public key, not the ECMA pseudo key.