ObservableCollection Data to CSV - Helpme solve Bug

I'm using an ObservableCollection in my application; and I export that data to CSV. The export function works well ONLY the first time I export the data. The second time I export the data, the columns get different - but still exports.

I need you to fix that bug, and help export all the data in the collection in the same order the columns are originally.

Sample Code:

public static IEnumerable<string> ToCsv<T>(IEnumerable<T> list)

{

var fields = typeof(T).GetFields();

var properties = typeof(T).GetProperties().OrderBy(p=> "Time");

foreach (var @object in list)

{

yield return [url removed, login to view](",",

[url removed, login to view](x => ([url removed, login to view](@object) ?? [url removed, login to view]).ToString())

.Concat([url removed, login to view](p => ([url removed, login to view](@object, null) ?? [url removed, login to view]).ToString()))

.ToArray());

}

}

When I click Export Button:

using (var textWriter = [url removed, login to view](fileName))

{

string header = "Header Title Here"

[url removed, login to view](header);

foreach (var line in ToCsv([url removed, login to view] as ObservableCollection<[url removed, login to view]>))

{

[url removed, login to view](line);

}

}

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项目ID： #16919168

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