namespace System.Dynamic { public abstract class DynamicMetaObjectBinder : CallSiteBinder { public virtual Type ReturnType { get; } protected DynamicMetaObjectBinder(); public abstract DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args); public DynamicMetaObject Defer(DynamicMetaObject target, params DynamicMetaObject[] args); public DynamicMetaObject Defer(params DynamicMetaObject[] args); public Expression GetUpdateExpression(Type type); } }