How Can LINQ Efficiently Update a Collection of Objects' Properties?

Streamlining Object Property Updates using LINQ

Modifying properties across a collection of objects is a frequent programming requirement. Consider a scenario where a developer needs to adjust the datetime property of numerous blog comments, adding 10 hours to each. While a SQL solution exists, a more efficient in-application approach using LINQ is preferred.

LINQ's Select method offers a clean solution. Select transforms each element in a collection. In this instance, it modifies the datetime property:

<code class="language-csharp">collection.Select(c => { c.PropertyToSet = value; return c; }).ToList();</code>

The ToList() method is critical. Without it, LINQ's lazy evaluation would prevent immediate execution. ToList() forces immediate evaluation, ensuring all properties are updated.

This LINQ approach provides a compact and efficient way to update object properties within a collection, simplifying development and keeping the logic within the application's business layer.

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