public abstract class InspectorProvider 

public class MyProvider : InspectorProvider
{
  private System.Guid guid = System.Guid.NewGuid();
  internal MyProvider()
  {
  }
  public override System.Guid SharedFieldColumnSizeID()
  {
    return guid;
  }

  public override string CustomName(Attribute attr)
  {
    //Giving a custom name to be displayed for the field FeatureID
    if (attr.FieldName == "FeatureID")
      return "Feature Identification";

    return attr.FieldName;
  }
  public override bool? IsVisible(Attribute attr)
  {
    //The field FontStyle will not be visible
    if (attr.FieldName == "FontStyle")
      return false;

    return true;
  }
  public override bool? IsEditable(Attribute attr)
  {
    //The field DateField will not be editable
    if (attr.FieldName == "DateField")
      return false;

    return true;
  }
  public override bool? IsHighlighted(Attribute attr)
  {
    //ZOrder field will be highlighted in the feature inspector grid
    if (attr.FieldName == "ZOrder")
      return true;

    return false;
  }

  public override IEnumerable<Attribute> AttributesOrder(IEnumerable<Attribute> attrs)
  {
    //Reverse the order of display
    var newList = new List<Attribute>();
    foreach (var attr in attrs)
    {
      newList.Insert(0, attr);
    }
    return newList;
  }

  public override bool? IsDirty(Attribute attr)
  {
    //The field will not be marked dirty for FeatureID if you enter the value -1
    if ((attr.FieldName == "FeatureID") && (attr.CurrentValue.ToString() == "-1"))
      return false;

    return base.IsDirty(attr);
  }

  public override IEnumerable<ArcGIS.Desktop.Editing.Attributes.Attribute.ValidationError> Validate(Attribute attr)
  {
    var errors = new List<ArcGIS.Desktop.Editing.Attributes.Attribute.ValidationError>();

    if ((attr.FieldName == "FeatureID") && (attr.CurrentValue.ToString() == "2"))
      errors.Add(ArcGIS.Desktop.Editing.Attributes.Attribute.ValidationError.Create("Value not allowed", ArcGIS.Desktop.Editing.Attributes.Severity.Low));

    if ((attr.FieldName == "FeatureID") && (attr.CurrentValue.ToString() == "-1"))
      errors.Add(ArcGIS.Desktop.Editing.Attributes.Attribute.ValidationError.Create("Invalid value", ArcGIS.Desktop.Editing.Attributes.Severity.High));

    return errors;
  }
}

var layer = ArcGIS.Desktop.Mapping.MapView.Active.Map.GetLayersAsFlattenedList().OfType<ArcGIS.Desktop.Mapping.FeatureLayer>().FirstOrDefault();

var provider = new MyProvider();
Inspector _featureInspector = provider.Create();
//Create an embeddable control from the inspector class to display on the pane
var icontrol = _featureInspector.CreateEmbeddableControl();

await _featureInspector.LoadAsync(layer, oid);
var attribute = _featureInspector.Where(a => a.FieldName == "FontStyle").FirstOrDefault();
var visibility = attribute.IsVisible; //Will return false

attribute = _featureInspector.Where(a => a.FieldName == "ZOrder").FirstOrDefault();
var highlighted = attribute.IsHighlighted; //Will return true