I want to study the source code of DevExpress, does anyone have any information about that ? Since I really don't know how to start to read it. if you are also researching the source code of devexpress and you would share it on your blog, then could you please give me your blog link ?
EDIT: once you purchase the universal version it will offer you the source for debugging, please refer to https://www.devexpress.com/ClientCenter/Order/default.aspx?group=.NET
DevExpress is a commercial product and hence the source code is not available to read.
You might be able to use .NET Reflector to reverse the compiled binaries, but my experience with a similar 3rd-party set of controls was that they had obfuscated the code to prevent this.
DevExpress is a company, not an open source enterprise. The products it develops belongs to the company and are not open source.
You will not be able to find this source code easily - your best course of action is to ask them directly, though I doubt they will share any without a substantial fee.