public CreatePortfolioDynamicResponse CreatePortfolioDynamic( 
   CreatePortfolioDynamicRequest request
)

using AIR.Services.Common.Data;
using AIR.Services.Common.Filter.Data;
using AIR.Services.Reinsurance.PortfolioManagement.Api;
using System;
using System.Collections.Generic;
            
class SnippetPortfolioAPIs
{
    private static void CreatePortfolioDynamic(int businessUnitSid, int sqlInstanceSid, string name)
    {
        ReinsurancePortfolioManagementServiceClient client = new ReinsurancePortfolioManagementServiceClient();
            
        CreatePortfolioDynamicRequest request = new CreatePortfolioDynamicRequest();
        //Set the BusinessUnitSid property (required property)
        request.BusinessUnitSid = businessUnitSid;
        //Set the SqlInstanceSid property (required property)
        request.SqlInstanceSid = sqlInstanceSid;
        //Set the Name property. (required property)
        request.Name = name;
        //Set the Description property. (optional property)
        request.Description = "Created by API";
        request.Filter = GetFilter();
        //Submit the request and get response back
        CreatePortfolioDynamicResponse response = client.CreatePortfolioDynamic(request);
        //Validate the response. Response is valid if Response.Status.Code is equal to StatusCode.Success
        if (response.Status.Code == StatusCode.Success)
        {
            Console.WriteLine("Portfolio created with SID: " + response.PortfolioSid);
        }
    }
            
    private static Filter GetFilter()
    {
        //Create the first composite expression 
        CompositeExpression expression = new CompositeExpression()
        {
            //Set the FilterExpressions property. FilterExpressions consist of a list of simple or composite expressions
            FilterExpressions = new List<FilterExpression>()
                {
                    new SimpleExpression()
                    {
                        //Set the AppliedEntity property. Refer to the developers guide for valid options (required property)
                        AppliedEntity = "ViewReinsuranceTreatyDetails",
                        //Set the PropertyName property. The property values are based on the AppliedEntity property. 
                        //Refer to the developers guide for valid options (required property)
                        //https://www.air-worldwide.com/Documentation/APIs/TouchstoneRe/7.1/webframe.html#topic360.html
                        PropertyName = "CompanyName",
                        //Set the Operator property. The property values are based on the PropertyName property. 
                        //Refer to the developers guide for valid options (required property)
                        Operator = FilterOperator.IsNotEqualTo,
                        //Set the Value property. The data type of the property is based on the PropertyName property.
                        //Refer to the developers guide for valid options (required property)
                        Value = "Test"
                    }
                },
            LogicalOperator = LogicalOperator.And
        };
        //Add the filter to a list and return. R1 supports one filter expression in the filters collection
        return new Filter() { Expression = expression };
    }
}