<PackageReference Include="Relativity.Server.Services.Interfaces.SDK" Version="5000.0.2" />

Relativity.Services.Objects.DataContracts.FieldRefValuePair

public class FieldRefValuePair
Represents a key or reference to a Field object and the value currently assigned to it.
public FieldRef Field { get; set; }

Gets or sets a FieldRef object.

public object Value { get; set; }

Gets or sets the value assigned to a field.