C#: Dynamic runtime cast

Question

I would like to implement a method with the following signature

dynamic Cast(object obj, Type castTo);

Anyone know how to do that? obj defi

Answer 1

You can use the expression pipeline to achieve this:

 public static Func Caster(Type type)
 {
    var inputObject = Expression.Parameter(typeof(object));
    return Expression.Lambda>(Expression.Convert(inputObject, type), inputPara).Compile();
 }

which you can invoke like:

object objAsDesiredType = Caster(desiredType)(obj);

Drawbacks: The compilation of this lambda is slower than nearly all other methods mentioned already

Advantages: You can cache the lambda, then this should be actually the fastest method, it is identical to handwritten code at compile time