GetRuntimeProperties instead of GetProperty

I need to find property inside of generic type. This is an old way (and since my code is dedicated for WinRT I believe I need another approach):

PropertyInfo pi = typeof(TRp).GenericTypeArguments[0].GetProperty(idField, BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance);  

I need to achieve the same result using GetRuntimeProperties. This is my approach:

PropertyInfo pi = typeof(TRp).GenericTypeArguments[0].GetRuntimeProperties().Single(p => p.Name.ToUpper() == idField.ToUpper()...  

as you can see I implemented IgnoreCase in a custom way, probably it can be done better?

How can I implement remaining BindingFlags?

Thank you!