namespace System.Dynamic { public abstract class SetIndexBinder : DynamicMetaObjectBinder { public CallInfo CallInfo { get; } protected SetIndexBinder(CallInfo callInfo); public DynamicMetaObject FallbackSetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject value); public abstract DynamicMetaObject FallbackSetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject value, DynamicMetaObject errorSuggestion); } }