public Task <ValueModel?> Create(ValueModel value)
{
int nextId = (from v in _values select v.Key).Max() + 1;
value.Id = nextId;
return(_values.TryAdd(value.Id, value) ? Task.FromResult <ValueModel?>(value) : Task.FromResult <ValueModel?>(null));
}
public Task <ValueModel?> Update(ValueModel value)
{
if (!_values.TryGetValue(value.Id, out var comparisonValue))
{
throw new NotFoundException();
}
return(_values.TryUpdate(value.Id, value, comparisonValue)
? Task.FromResult <ValueModel?>(value)
: Task.FromResult <ValueModel?>(null));
}