Documentation

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 # NesContainers
-A simple .NET library for working with NES/Famicom containers: .nes (iNES, NES 2.0), .unf (UNIF) and .fds (Famicom Disk System images).
+A simple .NET library for working with NES/Famicom ROM containers: .nes (iNES, NES 2.0), .unf (UNIF) and .fds (Famicom Disk System images).
 
 Full documentation: https://clusterm.github.io/nes-containers/
+
+## Usage
+
+There are three classes for different type of containers.
+
+### .nes (iNES, NES 2.0)
+
+Most popular ROM container.
+
+Load ROM: `var nesfile = new NesFile(filename)` or `var nesfile = NesFile.FromFile(filename)`
+
+Access different fields:
+
+`nesfile.Mapper = 4;` // Set mapper
+
+`nesfile.PRG = new byte[32768]; // Set PRG data
+
+`nesfile.CHR = new byte[8192];  // Set CHR data
+
+`nesfile.Battery = true;        // Enable battery saves
+