namespace System.Runtime.CompilerServices { public abstract class CallSiteBinder { public static LabelTarget UpdateLabel { get; } protected CallSiteBinder(); public abstract Expression Bind(object[] args, ReadOnlyCollection<ParameterExpression> parameters, LabelTarget returnLabel); public virtual T BindDelegate<T>(CallSite<T> site, object[] args) where T : class; protected void CacheTarget<T>(T target) where T : class; } }