Wrappers for WriteXml() and ReadXml() methods of DataSet and DataTable objects that first compresses the XML using Gzip.

DataSetCompressionExtensions.cs

/**
 * \author      Drew Chapin <drew@drewchapin.com>
 * \copyright   Public Domain
 * \date        2017/12/08
 * \details     Wrappers for WriteXml() and ReadXml() methods of DataSet and DataTable objects that first compresses the XML using Gzip.
 * 
 * https://gist.github.com/drewchapin/57b3ae7d5c4ba257aa4e02db88388f9e
 * 
 */
using System;
using System.Data;
using System.IO;
using System.IO.Compression;

namespace Porcupine
{
	public static class DataSetCompressionExtensions
	{

		/// <summary>
		/// Wrapper for DataSet.WriteXml() method that compresses the file first using the GZip library.
		/// </summary>
		/// <param name="fileName">The file name (including the path) to which to write.</param>
		/// <param name="mode">One of the System.Data.XmlWriteMode values.</param>
		public static void WriteCompressedXml( this DataSet dataSet, string fileName, XmlWriteMode mode )
		{
			Uri uri = new Uri(fileName);
			using( FileStream file = new FileStream(uri.LocalPath,FileMode.Create,FileAccess.Write) )
			using( GZipStream gzip = new GZipStream(file,CompressionMode.Compress) )
			{
				dataSet.WriteXml(gzip,mode);
			}
		}

		/// <summary>
		/// Wrapper for DataSet.WriteXml() method that compresses the file first using the GZip library.
		/// </summary>
		/// <param name="fileName">The file name (including the path) to which to write.</param>
		public static void WriteCompressedXml( this DataSet dataSet, string fileName )
		{
			Uri uri = new Uri(fileName);
			using( FileStream file = new FileStream(uri.LocalPath,FileMode.Create,FileAccess.Write) )
			using( GZipStream gzip = new GZipStream(file,CompressionMode.Compress) )
			{
				dataSet.WriteXml(gzip);
			}
		}

		/// <summary>
		/// Wrapper for DataTable.WriteXml() method that compresses the file first using the GZip library.
		/// </summary>
		/// <param name="fileName">The file name (including the path) to which to write.</param>
		/// <param name="mode">One of the System.Data.XmlWriteMode values.</param>
		public static void WriteCompressedXml( this DataTable dataTable, string fileName, XmlWriteMode mode )
		{
			Uri uri = new Uri(fileName);
			using( FileStream file = new FileStream(uri.LocalPath,FileMode.Create,FileAccess.Write) )
			using( GZipStream gzip = new GZipStream(file,CompressionMode.Compress) )
			{
				dataTable.WriteXml(gzip,mode);
			}
		}

		/// <summary>
		/// Wrapper for DataTable.WriteXml() method that compresses the file first using the GZip library.
		/// </summary>
		/// <param name="fileName">The file name (including the path) to which to write.</param>
		public static void WriteCompressedXml( this DataTable dataTable, string fileName )
		{
			Uri uri = new Uri(fileName);
			using( FileStream file = new FileStream(uri.LocalPath,FileMode.Create,FileAccess.Write) )
			using( GZipStream gzip = new GZipStream(file,CompressionMode.Compress) )
			{
				dataTable.WriteXml(gzip);
			}
		}

		/// <summary>
		/// Wrapper for DataSet.ReadXml() method that compresses the file first using the GZip library.
		/// </summary>
		/// <param name="fileName">The file name (including the path) from which to read.</param>
		/// <returns>The XmlReadMode used to read the data.</returns>
		public static XmlReadMode ReadCompressedXml( this DataSet dataSet, string fileName, XmlReadMode mode )
		{
			Uri uri = new Uri(fileName);
			using( FileStream file = new FileStream(uri.LocalPath,FileMode.Open,FileAccess.Write) )
			using( GZipStream gzip = new GZipStream(file,CompressionMode.Decompress) )
			{
				return dataSet.ReadXml(gzip,mode);
			}
		}

		/// <summary>
		/// Wrapper for DataSet.ReadXml() method that compresses the file first using the GZip library.
		/// </summary>
		/// <param name="fileName">The file name (including the path) from which to read.</param>
		public static XmlReadMode ReadCompressedXml( this DataSet dataSet, string fileName )
		{
			Uri uri = new Uri(fileName);
			using( FileStream file = new FileStream(uri.LocalPath,FileMode.Open,FileAccess.Write) )
			using( GZipStream gzip = new GZipStream(file,CompressionMode.Decompress) )
			{
				return dataSet.ReadXml(gzip);
			}
		}

		/// <summary>
		/// Wrapper for DataTable.ReadXml() method that compresses the file first using the GZip library.
		/// </summary>
		/// <param name="fileName">The file name (including the path) from which to read.</param>
		/// <returns>The XmlReadMode used to read the data.</returns>
		public static XmlReadMode ReadCompressedXml( this DataTable dataTable, string fileName )
		{
			Uri uri = new Uri(fileName);
			using( FileStream file = new FileStream(uri.LocalPath,FileMode.Open,FileAccess.Write) )
			using( GZipStream gzip = new GZipStream(file,CompressionMode.Decompress) )
			{
				return dataTable.ReadXml(gzip);
			}
		}

	}
}