如何确定ParameterInfo是否为返回参数

Question

How can one determine if a ParameterInfo is a Return Parameter?

I wrote the function below, but I'm concerned that I may be missing something:

public bool IsReturnParameter(ParameterInfo parameter){
    var method = parameter.Member as MethodInfo;
    return method != null && parameter.Equals(method.ReturnParameter);
}

I am basing this on a couple assumptions, which may be flawed: (1) Parameters are declared on members that are MethodInfo , ConstructorInfo or PropertyInfo (indexers). (2) ConstructorInfo and PropertyInfo will never have a return parameter.

Answer 1

您可以检查ParameterInfo.Position == -1 ...但是您的相等性检查似乎同样好...尽管在某些情况下它不能正确处理覆盖或接口或泛型类型。

Answer 2

Assuming you're referring to out int foo , you want parameter.IsOut .

If you want the return value, try IsRetval , although I've never heard of that before.