From the course: Advanced C#: Functional Programming Patterns

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Use factory method to create instance

Use factory method to create instance - C# Tutorial

From the course: Advanced C#: Functional Programming Patterns

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Use factory method to create instance

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Here's a classic problem you'll find in immutable types, or any type that has their property set to a constructor. It's called constructor explosion, and it comes from when you have constructors that are used to set the properties, and you make a lot of those properties optional. So let's say I've got four properties now: red, green, blue, and alpha, which is the transparency level. And none of these are required. So I can have a constructor that takes zero arguments or I can have a constructor that only takes red, or one that only takes blue, or one that takes alpha and green, or red and blue. You get the idea. So I could go from, I might need 15 constructors for properties or 31 constructors for five properties. So that's the explosion. Now the solution for this is to write a factory method or a builder method that builds it with these options. You can do this with constructors, but this is a more elegant approach. So let's see what we've done. So I've added the fourth property…

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