Code behind in ASP.NET using C#

 

In this example we explain that how to change CSS dynamically from code behind in asp.net using C#. or how to change CSS file programmatically in C# code(back end  code) in asp.net. Some time we have requirement like if user click on or check Lightweight button then Lightweight CSS is apply to the application for these user only same like if user checked or click on Professional button then Professional look is applied to the application for these user only these totally is dynamic and depend on user requirement.

So how to change or switch CSS file dynamically from code behind in asp.net using C#.

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ChangeCSSFileDynamically.aspx:

ChangeCSSFileDynamically.aspx.cs:

Lightweight.css:

Professional.css: