https://learn.microsoft.com/en-us/dotnet/api/system.data.datatablereader?view=netframework-4.8.1&redirectedfrom=MSDN
DataTableReader Class (System.Data) | Microsoft Learn
The DataTableReader obtains the contents of one or more DataTable objects in the form of one or more read-only, forward-only result sets.
class systemdatamicrosoftlearn
https://learn.microsoft.com/ru-ru/dotnet/api/system.data.datatablereader?view=netframework-4.8.1&viewFallbackFrom=net-8.0
DataTableReader Class (System.Data) | Microsoft Learn
The DataTableReader obtains the contents of one or more DataTable objects in the form of one or more read-only, forward-only result sets.
class systemdatamicrosoftlearn
https://learn.microsoft.com/ru-ru/dotnet/api/system.data.datatablereader.getvalue?view=netframework-4.8.1&viewFallbackFrom=net-8.0
DataTableReader.GetValue(Int32) Method (System.Data) | Microsoft Learn
Gets the value of the specified column in its native format.
system datagetvaluemethodmicrosoftlearn
https://learn.microsoft.com/de-de/dotnet/api/system.data.datatablereader.isdbnull?view=netframework-4.8.1&viewFallbackFrom=net-10.0
DataTableReader.IsDBNull(Int32) Method (System.Data) | Microsoft Learn
Gets a value that indicates whether the column contains non-existent or missing values.
system datamethodmicrosoftlearn