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Named Binary Tag (NBT) is a structured binary file format used by Minecraft. fNBT is a small library, written in C# for .NET 2.0+. It provides functionality to create, load, traverse, modify, and save NBT files and streams.

Current released version is 0.5.0 (17 March 2013).

fNBT is based in part on Erik Davidson's (aphistic's) original LibNbt library, now completely rewritten by Matvei Stefarov (fragmer).

Note that fNBT.Test.dll and nunit.framework.dll do NOT need to be bundled with applications that use fNBT; they are only used for testing.

==== FEATURES ====

• Load and save uncompressed, GZip-, and ZLib-compressed files/streams.
• Easily create, traverse, and modify NBT documents.
• Simple indexer-based syntax for accessing compound, list, and nested tags.
• Shortcut properties to access tags' values without unnecessary type casts.
• Compound tags implement ICollection and List tags implement IList, for easy traversal and LINQ integration.
• Good performance and low memory overhead.
• Built-in pretty printing of individual tags or whole files.
• Every class and method are fully documented, annotated, and unit-tested.
• Can work with both big-endian and little-endian NBT data and systems.

==== EXAMPLES ====

• Loading a gzipped file:

    using( FileStream stream = File.OpenRead( "somefile.nbt.gz" ) ) {
        var file = new NbtFile( stream );
        var myCompoundTag = myFile.RootTag;
    }

• Accessing tags (long/strongly-typed style):

    int intVal = myCompoundTag.Get<NbtInt>( "intTagsName" ).Value;
    string listItem = myStringList.Get<NbtString>( 0 ).Value;
    byte nestedVal = myCompTag.Get<NbtCompound>( "nestedTag" )
                              .Get<NbtByte>( "someByteTag" )
                              .Value;

• Accessing tags (shortcut style):

    int intVal = myCompoundTag["intTagsName"].IntValue;
    string listItem = myStringList[0].StringValue;
    byte nestedVal = myCompTag["nestedTag"]["someByteTag"].ByteValue;

• Iterating over all tags in a compound/list:

    foreach( NbtTag tag in myCompoundTag.Values ) {
        Console.WriteLine( tag.Name + " = " + tag.TagType );
    }
    foreach( string tagName in myCompoundTag.Names ) {
        Console.WriteLine( tagName );
    }
    for( int i = 0; i < myListTag.Count; i++ ) {
        Console.WriteLine( myListTag[i] );
    }
    foreach( NbtInt intListItem in myIntList.ToArray<NbtInt>() ) {
        Console.WriteLine( listIntItem.Value );
    }

• Constructing a new document

    var serverInfo = new NbtCompound( "Server" );
    serverInfo.Add( new NbtString( "Name", "BestServerEver" ) );
    serverInfo.Add( new NbtInt( "Players", 15 ) );
    serverInfo.Add( new NbtInt( "MaxPlayers", 20 ) );
    var serverFile = new NbtFile( serverInfo );
    using( FileStream stream = File.File.OpenWrite( "server.nbt" ) ) {
        serverFile.SaveToFile( "server.nbt", NbtCompression.None );
    }

• Constructing using collection initializer notation:

    var compound = new NbtCompound( "root" ) {
        new NbtInt( "someInt", 123 ),
        new NbtList( "byteList" ){
            new NbtByte( 1 ),
            new NbtByte( 2 ),
            new NbtByte( 3 )
        },
        new NbtCompound( "nestedCompound" ) {
            new NbtDouble( "pi", 3.14 )
        }
    };

• Pretty-printing file structure:

    Console.WriteLine( myFile.ToString("\t") );
    Console.WriteLine( myRandomTag.ToString("    ") );

• Check out unit tests in fNbt.Test for more examples.

==== LICENSING =====

fNbt v0.5.0+ is licensed under BSD-3clause license. See ./docs/LICENSE LibNbt2012 up to and including v0.4.1 kept LibNbt's original license (LGPLv3). LibNbt2012 makes use of the NUnit framework (www.nunit.org)