Query regarding .NET Reflection support in .NET Core

Question

We were porting a .NET 4.0 class Library to .NET Core 1.1 and struck an issue of limited support for .NET Reflection in the .NET Core CLR.

Can anyone help us with any details related to the .net core equivalent for calling Type.GetProperties and Type.GetCustomAttributes methods on an assembly object?

 Using System.Type;
 Type myType;   
    var prop = myType.GetProperties();
    var attrib = myType.GetCustomAttributes(true);

We can see there is CustomAttributes property, but this doesn't return instances of the custom attributes, but rather metadata about the attributes.

Call Type.GetTypeInfo first.

Lex Li
– Lex Li

2017-01-11 13:39:21 +00:00
Commented Jan 11, 2017 at 13:39 — Lex Li
– Lex Li, Commented Jan 11, 2017 at 13:39

Stuart · Accepted Answer · 2017-01-11 20:41:01Z

2

You'll need to use GetTypeInfo like this:

using System;
using System.Reflection;

Type myType = ...;   
TypeInfo myTypeInfo = myType.GetTypeInfo();

var prop = myTypeInfo.GetProperties();
var attrib = myTypeInfo.GetCustomAttributes(true);

When .NET Standard 2.0 and .NET Core 2.0 arrive, my understanding is that you won't need to make this change and can use the original APIs.

edited Jan 11, 2017 at 20:41

answered Jan 11, 2017 at 20:08

Stuart

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1 Comment

Kevin Anderson Over a year ago

As an addendum, this document, titled "Porting to .NET Core" explicitly states the changes to System.Type and to do what you're recommending: blogs.msdn.microsoft.com/dotnet/2016/02/10/porting-to-net-core

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