Hide implement class for user

src/MiniExcel/Csv/CsvConfiguration.cs

@@ -9,3 +9,4 @@ namespace MiniExcelLibs.Csv
         public Func<Stream, StreamReader> GetStreamReaderFunc { get; set; } = (stream) => new StreamReader(stream);
     }
 }
+

src/MiniExcel/Csv/CsvProvider.cs

@@ -3,7 +3,7 @@ using System.IO;
 
 namespace MiniExcelLibs.Csv
 {
-    public class CsvProvider : ExcelProviderBase
+    internal class CsvProvider : ExcelProviderBase
     {
         private IExcelReader _csvlReader;
         private IExcelWriter _csvWriter;

src/MiniExcel/Csv/CsvReader.cs

@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace MiniExcelLibs.Csv
 {
-    public class CsvReader : IExcelReader
+    internal class CsvReader : IExcelReader
     {
         public IEnumerable<IDictionary<string, object>> Query(Stream stream, bool useHeaderRow)
         {

src/MiniExcel/OpenXml/ExcelOpenXmlProvider.cs

@@ -12,7 +12,7 @@ using System.Xml.Linq;
 
 namespace MiniExcelLibs.OpenXml
 {
-    public class ExcelOpenXmlProvider : ExcelProviderBase
+    internal class ExcelOpenXmlProvider : ExcelProviderBase
     {
         private IExcelReader _excelReader;
         private IExcelWriter _excelWriter;