Firebird ADO.NET Provider SDK Documentation - v1.7

FbDataReader.Read Method 

Advances the FbDataReader to the next record.

[Visual Basic]
NotOverridable Public Function Read() As Boolean _
    Implements IDataReader.Read
[C#]
public bool Read();

Return Value

true if there are more rows; otherwise, false.

Implements

IDataReader.Read

Remarks

The default position of the FbDataReader is prior to the first record. Therefore, you must call Read to begin accessing any data.

Only one FbDataReader per FbConnection can be open at a time, and any attempt to open another will fail until the first one is closed. Similarly, while the FbDataReader is in use, the associated FbConnection is busy serving it until you close the FbDataReader by call Close method.

See Also

FbDataReader Class | FirebirdSql.Data.Firebird Namespace