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To prevent resource leaks when using Linq in C#, the following steps can be taken:

1. Dispose of the Linq query object - When a Linq query object is no longer needed, it should be disposed of to free up any unmanaged resources it may be using.

2. Use the "using" statement - When working with objects that implement the IDisposable interface, such as Linq query objects, it is best practice to use the "using" statement. The "using" statement ensures that the object is disposed of correctly, even if an exception occurs.

3. Avoid using infinite or long-running Linq queries - Linq queries that run indefinitely can cause resource leaks. It is best to limit Linq queries to only retrieve the data needed.

4. Use lazy loading where possible - By using lazy loading, data is only loaded when it is needed, which helps to minimize resource usage.

5. Avoid unnecessary object creation - Creating new objects can lead to memory leaks. It is important to only create new objects when necessary and to dispose of them properly when they are no longer needed.