Answer
Immutability means an object's state cannot change after creation.
It avoids the need for locks and prevents corruption in multi-threaded environments.
Quick Answer
An immutable object never changes after creation. Since threads can only read it, no locks are needed — no race conditions possible. C# supports this with readonly fields, record types, and init-only properties. Immutability makes concurrent code dramatically simpler and safer.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ