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ZipArchive.GetEntry Method

.NET Framework 4.5

Retrieves a wrapper for the specified entry in the zip archive.

Namespace:  System.IO.Compression
Assembly:  System.IO.Compression (in System.IO.Compression.dll)

public ZipArchiveEntry GetEntry(
	string entryName


Type: System.String

A path, relative to the root of the archive, that identifies the entry to retrieve.

Return Value

Type: System.IO.Compression.ZipArchiveEntry
A wrapper for the specified entry in the archive; null if the entry does not exist in the archive.


entryName is Empty.


entryName is null.


The zip archive does not support reading.


The zip archive has been disposed.


The zip archive is corrupt, and its entries cannot be retrieved.

If multiple entries that have the specified name exist in the archive, the first one is returned. The name of the entry is compared to entryName using ordinal comparison.

The following example shows how to use the GetEntry method to retrieve an entry.

using System;
using System.IO;
using System.IO.Compression;

namespace ConsoleApplication1
    class Program
        static void Main(string[] args)
            string zipPath = @"c:\example\result.zip";

            using (ZipArchive archive = ZipFile.Open(zipPath, ZipArchiveMode.Update))
                ZipArchiveEntry entry = archive.GetEntry("ExistingFile.txt");
                using (StreamWriter writer = new StreamWriter(entry.Open()))
                    writer.BaseStream.Seek(0, SeekOrigin.End);
                    writer.WriteLine("append line to file");
                entry.LastWriteTime = DateTimeOffset.UtcNow.LocalDateTime;

.NET Framework

Supported in: 4.6

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Windows Phone 8.1

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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