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

Recently mapped

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

Entity Framework

Domain-Driven Development with EF v1

Entity Framework version 1 is data-centric in the features it implements. Domain-driven development begins with the model, not the database. Many developers who embrace the tenets of domain-driven design will find the Entity Framework...
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Entity Framework

Challenges with Change Tracking Distributed Applications

To put it mildly, using the Entity Framework in distributed applications can be challenging when it comes to the change tracking performed by Object Services, because the change-tracking information is not stored in the...
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Entity Framework

Limitation of Entity Data Model Designer

The disigner does not support all the features of the EDM. With some of less frequently used EDM features, you will have to work with the XML after all.
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Entity Framework

Entity in Entity Framework

Entities are not the same as objects. Entities define the schema of an object, but not its behavior. So, an entity is something like the schema of a table in your database, except that...
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WF

WF runtime

public class WorkflowRuntime { public WorkflowRuntime();
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