Question

I have three class as following:

public class TestEntity { }

public class BaseClass<TEntity> { }

public class DerivedClass : BaseClass<TestEntity> { }

I already get the System.Type object of DerivedClass using reflection in runtime. How can I get the System.Type object of TestEntity using reflection?

Thanks.

Answer 1

I assume that your code is just a sample and you don’t explicitly know DerivedClass.

var type = GetSomeType();
var innerType = type.BaseType.GetGenericArguments()[0];

Note that this code can fail very easily at run time you should verify if type you handle is what you expect it to be:

if(type.BaseType.IsGenericType 
     && type.BaseType.GetGenericTypeDefinition() == typeof(BaseClass<>))

Also there can be deeper inheritance tree so some loop with above condition would be required.