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):

C#

String connectionString = "InitiateOAuth=GETANDREFRESH;OrganizationUrl=https://myaccount.operations.dynamics.com/;";

using (D365FinOpConnection connection = new D365FinOpConnection(connectionString)) {
  D365FinOpCommand cmd = new D365FinOpCommand("SELECT accountid, Name INTO [csv://Accounts.txt] FROM [Accounts] WHERE Name = 'MyAccount' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;OrganizationUrl=https://myaccount.operations.dynamics.com/;" 

Using connection As New D365FinOpConnection(connectionString)
  Dim cmd As New D365FinOpCommand("SELECT accountid, Name INTO [csv://Accounts.txt] FROM [Accounts] WHERE Name = 'MyAccount'", 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 = "InitiateOAuth=GETANDREFRESH;OrganizationUrl=https://myaccount.operations.dynamics.com/;";

using (D365FinOpConnection connection = new D365FinOpConnection(connectionString)) {
  D365FinOpCommand cmd = new D365FinOpCommand("SELECT * INTO [Accounts] IN [csv://filename=c:/Accounts.csv;delimiter=tab] FROM [Accounts] WHERE Name <> 'MyAccount'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;OrganizationUrl=https://myaccount.operations.dynamics.com/;" 

Using connection As New D365FinOpConnection(connectionString)
  Dim cmd As New D365FinOpCommand("SELECT * INTO [Accounts] IN [csv://filename=c:/Accounts.csv;delimiter=tab] FROM [Accounts] WHERE Name <> 'MyAccount'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using