Gets a value indicating whether access to the ICollection is synchronized (thread safe).
Assembly: System (in System.dll)
Default implementations of collections in System.Collections.Generic are not synchronized.
Enumerating through a collection is intrinsically not a thread-safe procedure. In the rare case where enumerations contend with write accesses, you must lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
Retrieving the value of this property is an O(1) operation.
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