static void Test(string file) {
            OleDbConnection cn = new OleDbConnection("Provider = Microsoft.Jet.OLEDB.4.0; Data Source = " + Path.GetDirectoryName(file) + "; Extended Properties = dBase IV; User ID=;Password=");
            cn.Open();
            OleDbDataAdapter ad = new OleDbDataAdapter("Select top 1 * from " + Path.GetFileNameWithoutExtension(file), cn);
            DataSet ds = new DataSet("TABLE");
            ad.Fill(ds);
            foreach (DataRow row in ds.Tables[0].Rows) {
                foreach (DataColumn column in ds.Tables[0].Columns) {
                    var value = row[column].ToString();
                    var bytes = System.Text.Encoding.GetEncoding(866).GetBytes(value);
                    var res = System.Text.Encoding.GetEncoding(1251).GetString(bytes);
                    Console.WriteLine(res);
                }
            }
        }

        static void Main(string[] args) {
            Test(@"C:\\Base\\file.dbf");
            Console.ReadKey();
        }