You can use the SELECT INTO statement to export formatted data to a file.

Data Export with an SQL Query

The following query exports data into a file formatted in comma-separated values (CSV):

SELECT Id, Name INTO [csv://AdGroups.txt] FROM [AdGroups] WHERE CampaignId = '234505536'

You can specify other formats in the file URI. The possible delimiters are tab, semicolon, and comma with the default being a comma. The following example exports tab-separated values:

SELECT Id, Name INTO [csv://AdGroups.txt;delimiter=tab] FROM [AdGroups] WHERE CampaignId = '234505536'

C#

String connectionString = "AccountId=442311;CustomerId=5521444;DeveloperToken=11112332233;";

using (BingAdsConnection connection = new BingAdsConnection(connectionString)) {
  BingAdsCommand cmd = new BingAdsCommand("SELECT Id, Name INTO [csv://AdGroups.txt] FROM [AdGroups] WHERE CampaignId = '234505536' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "AccountId=442311;CustomerId=5521444;DeveloperToken=11112332233;" 

Using connection As New BingAdsConnection(connectionString)
  Dim cmd As New BingAdsCommand("SELECT Id, Name INTO [csv://AdGroups.txt] FROM [AdGroups] WHERE CampaignId = '234505536'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using

You can specify other file formats in the URI. The following example exports tab-separated values:

C#

String connectionString = "AccountId=442311;CustomerId=5521444;DeveloperToken=11112332233;";

using (BingAdsConnection connection = new BingAdsConnection(connectionString)) {
  BingAdsCommand cmd = new BingAdsCommand("SELECT * INTO [AdGroups] IN [csv://filename=c:/AdGroups.csv;delimiter=tab] FROM [AdGroups] WHERE CampaignId = '234505536'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "AccountId=442311;CustomerId=5521444;DeveloperToken=11112332233;" 

Using connection As New BingAdsConnection(connectionString)
  Dim cmd As New BingAdsCommand("SELECT * INTO [AdGroups] IN [csv://filename=c:/AdGroups.csv;delimiter=tab] FROM [AdGroups] WHERE CampaignId = '234505536'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using