diff --git a/src/MiniExcel/MiniExcelDataReader.cs b/src/MiniExcel/MiniExcelDataReader.cs
index 754ed830..93708977 100644
--- a/src/MiniExcel/MiniExcelDataReader.cs
+++ b/src/MiniExcel/MiniExcelDataReader.cs
@@ -1,12 +1,11 @@
 namespace MiniExcelLibs
 {
-    using System;
     using System.Collections.Generic;
     using System.Data;
     using System.IO;
     using System.Linq;
 
-    public class MiniExcelDataReader : IDataReader
+    public class MiniExcelDataReader : MiniExcelDataReaderBase
     {
         private readonly IEnumerator<IDictionary<string, object>> _source;
         private readonly int _fieldCount;
@@ -26,22 +25,29 @@ internal MiniExcelDataReader(Stream stream, bool useHeaderRow = false, string sh
             }
         }
 
-        public void Dispose()
-        {
-            _stream.Dispose();
-        }
-
-        public object GetValue(int i)
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public override object GetValue(int i)
         {
             return _source.Current[_keys[i]];
         }
 
-        public int FieldCount
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        public override int FieldCount
         {
             get { return _fieldCount; }
         }
 
-        public bool Read()
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <returns></returns>
+        public override bool Read()
         {
             if (_isFirst)
             {
@@ -51,135 +57,37 @@ public bool Read()
             return _source.MoveNext();
         }
 
-        public string GetName(int i)
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public override string GetName(int i)
         {
             return _keys[i];
         }
 
-        public int GetOrdinal(string name)
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="name"></param>
+        /// <returns></returns>
+        public override int GetOrdinal(string name)
         {
             var i = _keys.IndexOf(name);
             return _keys.IndexOf(name);
         }
 
-        public void Close()
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="disposing"></param>
+        protected override void Dispose(bool disposing)
         {
-            return;
-        }
-
-        public int Depth => throw new NotImplementedException();
-
-        public bool IsClosed => throw new NotImplementedException();
-
-        public int RecordsAffected => throw new NotImplementedException();
-
-        public object this[string name] => throw new NotImplementedException();
-
-        public object this[int i] => throw new NotImplementedException();
-
-        public DataTable GetSchemaTable()
-        {
-            throw new NotImplementedException();
-        }
-
-        public bool NextResult()
-        {
-            throw new NotImplementedException();
-        }
-
-        public bool GetBoolean(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public byte GetByte(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public long GetBytes(int i, long fieldOffset, byte[] buffer, int bufferoffset, int length)
-        {
-            throw new NotImplementedException();
-        }
-
-        public char GetChar(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public long GetChars(int i, long fieldoffset, char[] buffer, int bufferoffset, int length)
-        {
-            throw new NotImplementedException();
-        }
-
-        public IDataReader GetData(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public string GetDataTypeName(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public DateTime GetDateTime(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public decimal GetDecimal(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public double GetDouble(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public Type GetFieldType(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public float GetFloat(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public Guid GetGuid(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public short GetInt16(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public int GetInt32(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public long GetInt64(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public string GetString(int i)
-        {
-            throw new NotImplementedException();
-        }
-
-        public int GetValues(object[] values)
-        {
-            throw new NotImplementedException();
-        }
-
-        public bool IsDBNull(int i)
-        {
-            throw new NotImplementedException();
+            if (disposing)
+            {
+                _stream.Dispose();
+            }
         }
     }
 }
diff --git a/src/MiniExcel/MiniExcelDataReaderBase.cs b/src/MiniExcel/MiniExcelDataReaderBase.cs
new file mode 100644
index 00000000..3832bf6d
--- /dev/null
+++ b/src/MiniExcel/MiniExcelDataReaderBase.cs
@@ -0,0 +1,251 @@
+namespace MiniExcelLibs
+{
+    using System;
+    using System.Data;
+
+    /// <summary>
+    /// IDataReader Base Class
+    /// </summary>
+    public abstract class MiniExcelDataReaderBase : IDataReader
+    {
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual object this[int i] => null;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="name"></param>
+        /// <returns></returns>
+        public virtual object this[string name] => null;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        public virtual int Depth { get; } = 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        public virtual bool IsClosed { get; } = false;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        public virtual int RecordsAffected { get; } = 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        public virtual int FieldCount { get; }
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual bool GetBoolean(int i) => false;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual byte GetByte(int i) => byte.MinValue;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <param name="fieldOffset"></param>
+        /// <param name="buffer"></param>
+        /// <param name="bufferOffset"></param>
+        /// <param name="length"></param>
+        /// <returns></returns>
+        public virtual long GetBytes(int i, long fieldOffset, byte[] buffer, int bufferOffset, int length) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual char GetChar(int i) => char.MinValue;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <param name="fieldOffset"></param>
+        /// <param name="buffer"></param>
+        /// <param name="bufferOffset"></param>
+        /// <param name="length"></param>
+        /// <returns></returns>
+        public virtual long GetChars(int i, long fieldOffset, char[] buffer, int bufferOffset, int length) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual IDataReader GetData(int i) => null;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual string GetDataTypeName(int i) => string.Empty;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual DateTime GetDateTime(int i) => DateTime.MinValue;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual decimal GetDecimal(int i) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual double GetDouble(int i) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual Type GetFieldType(int i) => null;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual float GetFloat(int i) => 0f;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual Guid GetGuid(int i) => Guid.Empty;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual short GetInt16(int i) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual int GetInt32(int i) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual long GetInt64(int i) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="name"></param>
+        /// <returns></returns>
+        public virtual int GetOrdinal(string name) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <returns></returns>
+        public virtual DataTable GetSchemaTable() => null;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual string GetString(int i) => string.Empty;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="values"></param>
+        /// <returns></returns>
+        public virtual int GetValues(object[] values) => 0;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public virtual bool IsDBNull(int i) => false;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <returns></returns>
+        public virtual bool NextResult() => false;
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public abstract string GetName(int i);
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="i"></param>
+        /// <returns></returns>
+        public abstract object GetValue(int i);
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <returns></returns>
+        public abstract bool Read();
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        public virtual void Close()
+        {
+
+        }
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        /// <param name="disposing"></param>
+        protected virtual void Dispose(bool disposing)
+        {
+
+        }
+
+        /// <summary>
+        /// <inheritdoc/>
+        /// </summary>
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+    }
+}