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C# Raster - Convert Image to ICO in C#.NET

Online C# Guide for Converting Image to ICO in .NET Application


ICO image is a format that supports multi frame, which is usually used as icon in applications. It can adapt to different icon size, different pixels and resolutions.

Install XImage.Raster in C# Project

Add necessary references to your C#.NET project. Right-click the project and select "Add Reference..." to locate and add the following DLLs as project references;




Use corresponding namespaces;

  using RasterEdge.XImage.Raster;

Note: When you get the error "Could not load file or assembly 'RasterEdge.Imaging.Basic' or any other assembly or one of its dependencies. An attempt to load a program with an incorrect format", please check your configure as follows:


       If you are using x64 libraries/dlls, Right click the project -> Properties -> Build -> Platform target: x64.


       If using x86, the platform target should be x86.

Convert RasterImage to ICO

Sample Code (convert single frame image to ico):

ConvertHandler.Convert("input.jpeg", @"output.ico");

Sample Code (convert multi-frame image to ico):

RasterImage img = new RasterImage("input.tiff");