How to get the AssemblyTitle?

Question

I know the .NET Core replacement for Assembly.GetExecutingAssembly() is typeof(MyType).GetTypeInfo().Assembly, but what about the replacement for

Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyTitleAttribute), false)

I have tried appending the last bit of the code after assembly for the first solution mentioned like so:

typeof(VersionInfo).GetTypeInfo().Assembly.GetCustomAttributes(typeof(AssemblyTitleAttribute));

but it gives me a "Can't implicitly convert to object[] message.

UPDATE: Yes, as comments below indicate, I believe it is linked to the output type.

Here is the code snippet, and I am just trying to change it to be compatible with .Net Core:

public class VersionInfo
{
  public static string AssemlyTitle
  {
    get
    {
      object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyTitleAttribute), false);
      // More code follows

I have tried changing this to use CustomAttributeExtensions.GetCustomAttributes( but I don't currently understand c# enough to know how to implement the same code as above. I still get mixed up about MemberInfo and Type and the like. Any help is extremely appreciated!

Solution 1

I suspect that the issue is in code you have not shown: where you use the result of GetCustomAttributes(). That's because Assembly.GetCustomAttributes(Type, bool) in .Net Framework returns object[], while CustomAttributeExtensions.GetCustomAttributes(this Assembly, Type) in .Net Core returns IEnumerable<Attribute>.

So you need to modify your code accordingly. The simplest way would be to use .ToArray<object>(), but a better solution might be to change your code so that it can work with IEnumerable<Attribute>.

Solution 2

This works for me in .NET Core 1.0:

using System;
using System.Linq;
using System.Reflection;

namespace SO_38487353
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var attributes = typeof(Program).GetTypeInfo().Assembly.GetCustomAttributes(typeof(AssemblyTitleAttribute));
            var assemblyTitleAttribute = attributes.SingleOrDefault() as AssemblyTitleAttribute;

            Console.WriteLine(assemblyTitleAttribute?.Title);
            Console.ReadKey();
        }
    }
}

AssemblyInfo.cs

using System.Reflection;

[assembly: AssemblyTitle("My Assembly Title")]

project.json

{
  "buildOptions": {
    "emitEntryPoint": true
  },
  "dependencies": {
    "Microsoft.NETCore.App": {
      "type": "platform",
      "version": "1.0.0"
    },
    "System.Runtime": "4.1.0"
  },
  "frameworks": {
    "netcoreapp1.0": { }
  }
}

Solution 3

This works for me:

public static string GetAppTitle()
{
    AssemblyTitleAttribute attributes = (AssemblyTitleAttribute)Attribute.GetCustomAttribute(Assembly.GetExecutingAssembly(), typeof(AssemblyTitleAttribute), false);

    return attributes?.Title;
}

Solution 4

This is what i use:

private string GetApplicationTitle => ((AssemblyTitleAttribute)Attribute.GetCustomAttribute(Assembly.GetExecutingAssembly(), typeof(AssemblyTitleAttribute), false))?.Title ?? "Unknown Title";

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Comments

[PirateJubber]

You have definitely shed some light on the situation. I have added more of the code I am working with in the hopes of getting some additional guidance.

[PirateJubber]

I neglected to share the entire situation of what I was trying to do, but you are right, your solution does fix the error. Is there any way to rework it to work with object[]?

[svick]

@PirateJubber Added.