<PackageReference Include="NUnit" Version="3.5.0" />

SameAsConstraint

public class SameAsConstraint : Constraint
SameAsConstraint tests whether an object is identical to the object passed to its constructor
namespace NUnit.Framework.Constraints { public class SameAsConstraint : Constraint { private readonly object expected; public override string Description => "same as " + MsgUtils.FormatValue(expected); public SameAsConstraint(object expected) : base(expected) { this.expected = expected; } public override ConstraintResult ApplyTo<TActual>(TActual actual) { bool isSuccess = expected == (object)actual; return new ConstraintResult(this, actual, isSuccess); } } }