You can use this as a simple authentication mechanism.
Rather than have to login with a username & password, you can specify a ProxyKey that must be passed from a client before requests are processed.
This is helpful in situations where you would like to authenticate and execute an action in a single step.

public virtual string ProxyKey { get; set; }

Public Overridable Property ProxyKey As String
	Get
	Set

public:
virtual property String^ ProxyKey {
	String^ get ();
	void set (String^ value);
}

abstract ProxyKey : string with get, set
override ProxyKey : string with get, set