BlockVector<T>.MissingValueRepresentation Property

public override MissingValueRepresentation MissingValueRepresentation { get; }

Public Overrides ReadOnly Property MissingValueRepresentation As MissingValueRepresentation
	Get

public:
virtual property MissingValueRepresentation MissingValueRepresentation {
	MissingValueRepresentation get () override;
}

abstract MissingValueRepresentation : MissingValueRepresentation with get
override MissingValueRepresentation : MissingValueRepresentation with get

Property Value

This property is part of the implementation contract for derived vector types.

None means the vector does not provide a missing-value representation. ByValue means missingness is represented by comparing a specific in-band stored value with MissingValue. LogicalMask means missingness is represented by a separate Boolean mask. IndexMask means missingness is represented by a separate index structure or negative-index convention.

The base implementation reports an in-band representation except for Boolean vectors, for which false is an ordinary value rather than a missing sentinel. Setting MayHaveMissingValues to false clears only the advisory content state and preserves missing-value awareness.

A derived type with mask-based or otherwise out-of-band semantics must override IsMissingCore(Int32) and MissingValueRepresentation consistently.

Reference