A duck cast can be applied using the following static method call:
var result = Duck.Cast<ISample>(obj);
There will be a small amount of overhead in the first call, but
significant effort was made to maximum the performance of multiple casts.
Calling a method repeatedly or multiple methods on the resulting proxy object has almost no overhead. A cast of this form performs better than using dynamic after about 3 method calls.
For repeated casts to the same subject interface a higher performance option is available in the following form:
var fastCaster = Duck.GetFastCaster<ISample>(); var result = fastCaster(obj);
This is useful for a factory scenario or when casting multiple objects in a loop. This reduces overhead such that a cast of this form performs better than using dynamic after about 2 method calls.
A null-safe wrapper can be placed around a value with the following static method call:
var result = Safe.Wrap<ISample>(obj);
A call to a method of result will always return a value even if
obj==null. Return values will be the default value for the type (unless overridden by attribute on the subject interface).