I'm using reflection to use the list of objects of extrationrequest but having issue setting the instrument list when using dynamic class.

for example - using the code

dynamic obj = new CommoditiesCorrectionsHistoryExtractionRequest();

this will work good

extractionRequest.IdentifierList = InstrumentIdentifierList.Create(

new[]

{

new InstrumentIdentifier { Identifier = "191216100", IdentifierType = IdentifierType.Cusip,UserDefinedIdentifier = "AA" }

}, null, false);

this way, error was raised

Type[] typelist = GetTypesInNamespace(myAssembly, "ThomsonReuters.Dss.Api.Extractions.ExtractionRequests");

Type tt = typelist[0] //CommoditiesCorrectionsHistoryExtractionRequest

dynamic obj = Activator.CreateInstance(tt);

error will be raised

extractionRequest.IdentifierList = InstrumentIdentifierList.Create(

new[]

{

new InstrumentIdentifier { Identifier = "191216100", IdentifierType = IdentifierType.Cusip,UserDefinedIdentifier = "AA" }

}, null, false);