https://learn.microsoft.com/en-us/dotnet/api/system.string.join?view=netframework-4.8.1&viewFallbackFrom=net-5.0
String.Join Method (System) | Microsoft Learn
Concatenates the elements of a specified array or the members of a collection, using the specified separator between each element or member.
join methodstringsystemmicrosoftlearn
https://learn.microsoft.com/ru-ru/dotnet/api/system.linq.queryable.join?view=netframework-4.8.1
Queryable.Join Method (System.Linq) | Microsoft Learn
Correlates the elements of two sequences based on matching keys.
join methodsystemlinqmicrosoftlearn
https://learn.microsoft.com/cs-cz/dotnet/api/system.string.join?view=netframework-4.8.1&viewFallbackFrom=net-8.0
String.Join Method (System) | Microsoft Learn
Concatenates the elements of a specified array or the members of a collection, using the specified separator between each element or member.
join methodstringsystemmicrosoftlearn