public ContextClientBase(string key, string value, string endpointName) : this(ContextManager.CreateContext(key, value), endpointName)
 {
 }
 public ContextClientBase(string key, string value, Binding binding, EndpointAddress remoteAddress) : this(ContextManager.CreateContext(key, value), binding, remoteAddress)
 {
 }
 public ContextClientBase(string key, string value) : this(ContextManager.CreateContext(key, value))
 {
 }