One about foreach and type access

[SimpleZDM]

Description

I am a junior programmer.
I want you to debug the above problems, may not be as simple as you think.
This makes me very confused and I would like to have a.NET expert help explain.

Reproduction Steps

100%

Expected behavior

Cannot apply indexing with [] to an expression of type 'object'

Actual behavior

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Regression?

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Known Workarounds

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Configuration

.net 6

Other information

No response

Tagging subscribers to this area: @cston
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

I am a junior programmer.
I want you to debug the above problems, may not be as simple as you think.
This makes me very confused and I would like to have a.NET expert help explain.

Reproduction Steps

100%

Expected behavior

Cannot apply indexing with [] to an expression of type 'object'

Actual behavior

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Regression?

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Known Workarounds

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Configuration

.net 6

Other information

No response

Author:	soulzdm
Assignees:	-
Labels:	area-System.Linq.Expressions
Milestone:	-

Tagging subscribers to this area: @cston
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

I am a junior programmer.
I want you to debug the above problems, may not be as simple as you think.
This makes me very confused and I would like to have a.NET expert help explain.

Reproduction Steps

100%

Expected behavior

Cannot apply indexing with [] to an expression of type 'object'

Actual behavior

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Regression?

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Known Workarounds

An exception will be thrown if the type is not public (Cannot apply indexing with [] to an expression of type 'object')
It's easy to understand that the runtime environment finds out that it's a protected type so it throws an exception but you can access it directly with foreach whether test is a protected type or not private

Configuration

.net 6

Other information

No response

Author:	soulzdm
Assignees:	-
Labels:	area-System.Dynamic.Runtime, untriaged
Milestone:	-

[huoyaoyuan]

I cannot reproduce with following code on .NET 7:

using System;
using System.Collections.Generic;
using System.Linq;

namespace CSPlayground
{
    class Program
    {
        private class Test
        {

        }

        static void Main(string[] args)
        {
            var dic = new Dictionary<string, Test>();
            dic.Add("1", new());
            TestDynamic(dic, typeof(Test));
            Console.WriteLine("Hello, world!");
        }

        public static void TestDynamic(dynamic dy, Type e)
        {
            try
            {
                var o = dy["1"];
                var x = Enumerable.First(dy);

                foreach (var kvp in dy)
                {

                }
            }
            catch
            {

            }
        }
    }
}

No exception thrown with Test being private or public.

[stephentoub]

Closing as no repro and no subsequent response. Thanks.