Answer
Nullable reference types prevent null reference exceptions by enforcing compiler analysis and warnings for unsafe null operations.
Quick Answer
Nullable reference types (C# 8+) make null an explicit opt-in. You declare string? to say "this can be null" and string to mean "this should never be null." The compiler warns you when you dereference something that might be null. This catches null reference exceptions before they happen at runtime.
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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