private static void WalkReferences(ReferenceTest @ref, IList <ReferenceTest> refs)
{
if (refs.Contains(@ref))
{
throw new Exception($"Circular reference ({refs.Last().Id} referenced {@ref.Id} which was element {refs.IndexOf(@ref)} in the stack)");
}
refs = refs.Append(@ref).ToList();
WalkReferences(@ref.Ref, refs);
}
static void Main(string[] args)
{
var refA = new ReferenceTest()
{
Id = 1
};
var refB = new ReferenceTest()
{
Id = 2, Ref = refA
};
var refC = new ReferenceTest()
{
Id = 3, Ref = refB
};
refA.Ref = refC;
try
{
Reference.CheckCircular(refA);
}
catch (Exception e)
{
Console.WriteLine($"Caught circular reference exception: {e.Message}");
}
var refVal = new ReferenceValidator <ReferenceTest>(r => r.Ref, refA);
try
{
refVal.Validate();
}
catch (CircularReferenceException e)
{
Console.WriteLine($"Caught CircularReferenceException: {e.Message}");
}
}
public static void CheckCircular(ReferenceTest initial)
{
var refs = new List <ReferenceTest>();
WalkReferences(initial, refs);
}
