Enumerator | tool built to assist in automating the often tedious task | Security Testing library

Markdig.Syntax.Inlines.LinkInline itself implements IEnumerable, which cause Format-List to enumerate it and report the properties of the enumerated elements, even when passed via -InputObject.

Specifically, it enumerates the instance's one child element, which is of type Markdig.Syntax.Inlines.LiteralInline, and its properties are being displayed.

To prevent this enumeration, i.e. to see the properties of the instance itself, you must wrap it in an aux. single-element array:

Yes, as of now, the One Definition Rule in the C++ standard doesn't include enumerators.

However, the "the second a is a redeclaration of the first a" explanation doesn't work too.
From [dcl.enum#nt:enumerator-list] we can know that an enumerator-list is a list of enumerator-definition, so they're all definitions.

Update: The bug is fixed in EF Core 6.0, so the next applies to EF Core 5.0 only.

Looks like you have hit EF Core 5.0 query translation bug, so I would suggest to seek/report it to EF Core GitHub issue tracker.

From what I can tell, it's caused by "pushing down" the root query as subquery because of the Take operator (which is basically what First method is using in the second case). This somehow messes up the generated subquery aliases and leads to invalid SQL.

It can be seen by comparing the generated SQL for the first query

You can simply add the file name into the data pipeline using one of the following methods:

In the Data Flow Task, you can simply right-click on the Flat File Source, and click on the Show Advanced Editor option.

In the Flat File Source Advanced Editor, there is a property called FileNameColumnName. This property is used to add a column to the flat file source where the File Name is added.

You should only write the value of the column name and it will be added to the flat file source.

• Flat File Custom Properties
• Extract the File Name in SSIS Data Flows using the FileNameColumnName Property

Your issue can be solved by adding a Derived Column Transformation within the Data Flow Task. Then, add a column to the data pipeline using the variable that contains the File Name. (The variable used in the ForEach Loop Container's variables mappings tab)

You can learn more about Derived Column Transformation in the following article:

• SSIS Derived Columns with Multiple Expressions vs Multiple Transformations

• How to find which flat file contains data errors while loading multiple flat files using Foreach File enumerator in SSIS

The "member interpretation" refers to begin_expr and end_expr using members of the iterated type in contrast to using plain offsets for arrays or begin and end free functions.

The array interpretation is off the table, because it is only used for arrays. Next consider that there is std::begin and std::end:

Custom overloads of begin may be provided for classes and enumerations that do not expose a suitable begin() member function, yet can be iterated.

Now consider this example:

As mentioned by the comment on the question and on this site

https://github.com/dotnet/Scaffolding/issues/1713

Removing the nuget package Microsoft.AspNetCore.Identity from all projects in the relevant solution solves the problem.

In many cases (also in mine) its enough to reference the nuget package Microsoft.AspNetCore.Identity.EntityFrameworkCore

From what I can see, in your SongManager you are creating Dictionary ret, but not adding any values to. Instead, you are trying to directly assign values: ret[timings] = notes_enc[name];. Dictionary is not an array, you should use Add() method, like this: ret.Add(timings, notes_enc[name]);

You could use the ToEnumerable extension method from the System.Linq.Async package. The signature of this method is:

By design.

Citing from the docs.

The returned enumerator does not extend the lifetime of any object pairs in the table, other than the current one. It does not return entries that have already been collected or that were added after the enumerator was retrieved. Additionally, it may not return all entries that were present when the enumerator was retrieved, for example, entries that were collected or removed after the enumerator was retrieved but before they were enumerated.

The object that is being pointed to by the enumerator's Current property will not get garbage collected and can be safely accessed. If a key further in the enumerable gets GCed or removed, the enumerator will simply not access that element.

As mentioned by canton7 in the comments, this is required for the ConditionalWeakTable to remain thread-safe - other threads might be removing elements during another thread's enumeration.