var client = new BFSServiceReference.bfsapiSoapClient(); 


var credentials = new BFSServiceReference.Credentials()
{
    UserName = bfsusername, //Username of administrative user in your instance of BFS
    Password = bfspassword, //Password of the administrative user in your instance of BFS
};  
 
var request = new GetOrderTypeRequest
{
	Credentials = credentials,    
	identify = bfsidentifier, //Identifier is a unique token for your instance of BFS
 
	//Select the fields you want the response to contain
	Fields = new GetOrderTypeFields
	{
		BrickId = true,
	  	Key = true,
	   	Label = true,
	},

	//Empty filter gets all order types from the system    
	Args = new GetOrderTypeArgs()
};


var response = client.GetOrderTypes(request); //result from the BFS instance