Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time


Sgry.Ini is an INI file format parser written in pure C#. It is written in a single source file under less-restrictive zlib/libpng license.

Supported INI Format

For detail about the INI data format itself, please refer to Wikipedia:

Below is how this class parses given INI data:

  • Empty lines
    • Ignores
  • Comment line
    • A line starting with semi-colon (;) is recognized as comment
    • Ignores whitespaces at the beginning of each line
    • No comments allowed after a property definition line nor a section starting line
  • Section starting line
    • A line starting with '[' and ends with ']' is recognized as the start of a new section
    • Ignores whitespaces at the beginning and the end of each line
    • Substring between the first '[' and ']' becomes the name of the section
  • Property definition line
    • A line which is none of the above, and which includes an equal sign '=' is recognized as a property definition line
    • Substring between line-beginning and the first equal sign '=' is recognized as the name of the property
    • Substring after the first equal sign '=' in a property line is recognized as the value of the property
    • Whitespaces surrounding property name is ignored
  • Other
    • Can specify whether to ignore case of section and/or property names
    • Can recognize so-called "global properties"
      • To access use them, specify an empty string for section name.
    • Does not support escape characters such as "\n" nor "\x0041"
    • Does not support custom key/value delimiter (only '=' is supported)


Load from or save to files and strings

To load analyze INI document content, use IniDocument.Load method. Load method reads data from System.IO.TextReader so you can specify a System.IO.StreamReader to read data in a file, or a System.IO.StringReader to read data on the memory (string variable). See example below:

var ini = new IniDocument();

// Load INI data in a file
using( var file = new StreamReader("data.ini", Encoding.UTF8) )
    ini.Load( file );

// Load INI data on the memory (String object)
var str = "...(INI data here)...";
ini.Load( new StringReader(str) );

To serialize INI document content, use IniDocument.Save method. Save method writes serialized data to a System.IO.TextWriter. Next is an example code:

var ini = new IniDocument();

// Sets some values
ini.Set("", "foo", "bar");
ini.Set("[section]", "Foo", "Bar");

// Save INI data to a file
using( var file = new StreamWriter("data.ini", false, Encoding.UTF8) )
    file.NewLine = "\r\n";
    ini.Save( file );

// Save (serialize) INI data on the memory (as a StringBuilder object)
var buf = new StringBuilder();
var writer = new StringWriter( buf );
writer.NewLine = "\r\n";
ini.Save( new StringWriter(buf) );

Note that IniDocument.Set method does not write sections without a property. If you need to write such section, you need to implement your own serialization logic to do it by using IniDocument.Sections property.

Getting values

Getting values can be done with IniDocument.Get method. See example below:

/* Content of the file "data.ini":

// Load and parse INI document "data.ini"
var ini = new IniDocument();
using( var file = new StreamReader("data.ini", Encoding.UTF8) )
    ini.Load( file );

// Get property values in various types
ini.Get( "Profile", "Name", null ); // "Suguru" が返る
ini.Get( "Profile", "IsGeek", false ); // true が返る
ini.GetInt( "Profile", "Age", 0, Int32.MaxValue, 0 ); // 31 が返る
ini.Get( "Profile", "Address", "unknown" ); // "unknown" が返る

Get method takes "default value" as the third parameter. This value will be returned when the specified property was not found. Also, there are TryGet method which returns whether the property was found or not.

If you read a property whose value is an integer, GetInt method may be useful because it does not only get the value but also checks whether the value is in a specified range.

Adding or changing values

To add a new property or to change an existing property's value, use IniDocument.Set method. If specified property does not exist, a new property will be created in the IniDocument. Otherwise value of the existing property will be overwritten. Note that Set method can take any objects as value. See example below:

var ini = new IniDocument();
ini.Set( "Profile", "Name", "Suguru" );
ini.Set( "Profile", "Name", "Suguru Yamamoto" );
ini.Set( "Profile", "Age", 31 );
ini.Save( System.Console.Out );

// The code above outputs text below in the console window:
//Name=Suguru Yamamoto

Removing properties and sections

To remove sections or properties in a IniDocument, use IniDocument.Remove method.

Before using this library

This library is distributed under the zlib/libpng license. Note that zlib/libpng license is less restrictive for redistribution in the form of source files (not built binary files). If you want to use this library in a form of souce files, just pick up Source/Sgry.Ini/Ini.cs.


A single file INI document parser written in C#.







No packages published