Notes on software and the ideas behind it

Find the meaning
behind the code.

I’m Fred Yang. I write about software—how it works, why it behaves the way it does, and the ideas that make code easier to reason about.

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Working notes / 2026

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Architecture, reactivity, and the hidden relationships that shape frontend systems.

SharePoint

User control in site page

The site Page can be added to the site page in site page in sharepoint directly(not wrapped by web part). You can do these using sharepoint designer.
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SharePoint

Deploying web parts to customized site pages.

There are two ways to deploy web part pages to a site. one is using the elements.xml to define what is inside the web part zone, like the following.
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SharePoint

SharePoint Feature

Feature is mechanism that SharePoint used to deploy customized components. The built in components like document list, team site also deployed using feature. So basically, everything can be deployed as feature, for example list...
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SharePoint

Site Page Essential

A page template, such as default.aspx, is compiled into an assembly dynamic-link library (DLL) and loaded into memory just once per Web application. However, this page template and its efficient usage of memory can...
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SharePoint

Add a command to site action dropdown

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