﻿<?xml version="1.0" encoding="utf-8"?><Type Name="CompressionLevel" FullName="System.IO.Compression.CompressionLevel"><TypeSignature Language="C#" Value="public enum CompressionLevel" /><TypeSignature Language="ILAsm" Value=".class public auto ansi sealed CompressionLevel extends System.Enum" /><AssemblyInfo><AssemblyName>System</AssemblyName><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><Base><BaseTypeName>System.Enum</BaseTypeName></Base><Docs><remarks><attribution license="cc4" from="Microsoft" modified="false" /><para>Compression operations usually involve a tradeoff between the speed and the effectiveness of compression. You use the <see cref="T:System.IO.Compression.CompressionLevel" /> enumeration to indicate which factor is more important in your development scenario: the time to complete the compression operation or the size of the compressed file. These values do not correspond to specific compression levels; the object that implements compression determines how to handle them.</para><para>The following methods of the <see cref="T:System.IO.Compression.DeflateStream" />, <see cref="T:System.IO.Compression.GZipStream" />, <see cref="T:System.IO.Compression.ZipArchive" />, <see cref="T:System.IO.Compression.ZipFile" />, and <see cref="T:System.IO.Compression.ZipFileExtensions" /> classes include a parameter named compressionLevel that lets you specify the compression level:</para><list type="bullet"><item><para><see cref="M:System.IO.Compression.DeflateStream.#ctor(System.IO.Stream,System.IO.Compression.CompressionLevel)" /></para></item><item><para><see cref="M:System.IO.Compression.DeflateStream.#ctor(System.IO.Stream,System.IO.Compression.CompressionLevel,System.Boolean)" /></para></item><item><para><see cref="M:System.IO.Compression.GZipStream.#ctor(System.IO.Stream,System.IO.Compression.CompressionLevel)" /></para></item><item><para><see cref="M:System.IO.Compression.GZipStream.#ctor(System.IO.Stream,System.IO.Compression.CompressionLevel,System.Boolean)" /></para></item><item><para><see cref="M:System.IO.Compression.ZipArchive.CreateEntry(System.String,System.IO.Compression.CompressionLevel)" /></para></item><item><para><see cref="M:System.IO.Compression.ZipFile.CreateFromDirectory(System.String,System.String,System.IO.Compression.CompressionLevel,System.Boolean)" /></para></item><item><para><see cref="M:System.IO.Compression.ZipFileExtensions.CreateEntryFromFile(System.IO.Compression.ZipArchive,System.String,System.String,System.IO.Compression.CompressionLevel)" /></para></item></list></remarks><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>Specifies values that indicate whether a compression operation emphasizes speed or compression size.</para></summary></Docs><Members><Member MemberName="Fastest"><MemberSignature Language="C#" Value="Fastest" /><MemberSignature Language="ILAsm" Value=".field public static literal valuetype System.IO.Compression.CompressionLevel Fastest = int32(1)" /><MemberType>Field</MemberType><AssemblyInfo><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.IO.Compression.CompressionLevel</ReturnType></ReturnValue><Docs><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>The compression operation should complete as quickly as possible, even if the resulting file is not optimally compressed.</para></summary></Docs></Member><Member MemberName="NoCompression"><MemberSignature Language="C#" Value="NoCompression" /><MemberSignature Language="ILAsm" Value=".field public static literal valuetype System.IO.Compression.CompressionLevel NoCompression = int32(2)" /><MemberType>Field</MemberType><AssemblyInfo><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.IO.Compression.CompressionLevel</ReturnType></ReturnValue><Docs><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>No compression should be performed on the file.</para></summary></Docs></Member><Member MemberName="Optimal"><MemberSignature Language="C#" Value="Optimal" /><MemberSignature Language="ILAsm" Value=".field public static literal valuetype System.IO.Compression.CompressionLevel Optimal = int32(0)" /><MemberType>Field</MemberType><AssemblyInfo><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.IO.Compression.CompressionLevel</ReturnType></ReturnValue><Docs><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>The compression operation should be optimally compressed, even if the operation takes a longer time to complete.</para></summary></Docs></Member></Members></Type>