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c#genericsreflection
Tim Long
Tim Long

Reputation: 13788

How do I determine the generic type of an implemented interface using reflection?

I am writing something that needs to discover the types of all the properties in an object at runtime, using reflection. I'm fine with simple properties, I just get the PropertyInfo and the type is directly available. I can't work out what to do for generic collections, though. For example, suppose I am handed an instance of the following class at runtime:

public class AnyClass
  {
  public ICollection<int> ListOfInts;
  }

So I use Type.GetProperties and pretty soon I have my PropertyInfo object for ListOfInts.

What's my next step? How do I go from having the PropertyInfo, to working out that it is a list of ints? How can I determine the generic type (<int> in this example case) of the collection from just the PropertyInfo?

Upvotes: 0

Views: 83

Answers (2)

Alexei Levenkov
Alexei Levenkov

Reputation: 100547

I believe you are looking for generic arguments of the type. See PropertyInfo.PropertyType and Type.GenericTypeArguments

PropertyInfo.PropertyType.GenericTypeArgument

Upvotes: 2

Simon Whitehead
Simon Whitehead

Reputation: 65079

You can get the name of the generic argument type:

propertyInfo.PropertyType.GetGenericArguments()[0].Name

Upvotes: 2

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