.NET (Core and Framework)

at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)<br />
at System.Security.CodeAccessPermission.Demand()<br />
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)<br />
at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)<br />
at Bluap.Preloader.myRequestState_CompletedEvent(Object sender, EventArgs e)<br />
at Bluap.RequestState.Completed()<br />
at Bluap.Preloader.ReadCallBack(IAsyncResult asyncResult)<br />
at System.Net.LazyAsyncResult..ctor(Object myObject, Object myState, AsyncCallback myCallBack, Object result)<br />
at System.Net.ConnectStream.BeginReadWithoutValidation(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)<br />
at System.Net.ConnectStream.BeginRead(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)

public static bool HasFlagsEnum(Enum value)
{
   if (value == null)
   {
      throw new ArgumentNullException("value");
   }
 
   bool hasFlagsAttribute = false;
   FieldInfo fieldInfo = value.GetType().GetField(value.ToString());
   FlagsAttribute[] attributes = 
      (FlagsAttribute[])fieldInfo.GetCustomAttributes(typeof(FlagsAttribute), false);
 
   if (attributes != null && attributes.Length > 0)
   {
      hasFlagsAttribute = true;
   }
 
   return hasFlagsAttribute;
}

Color color = Color.Red | Color.Yellow;
 
if (HasFlagsEnum(color) == true)
{
   // do something
}