SensoFarm/Api/Start/AddRequiredHeaderParameter.cs

using System.Collections.Generic;
using Microsoft.OpenApi.Models;
using Swashbuckle.AspNetCore.SwaggerGen;

namespace Api.Start
{
   
    public class AddRequiredHeaderParameter : IOperationFilter
    {
        public void Apply(OpenApiOperation operation, OperationFilterContext context)
        {
            if (operation.Parameters == null)
                operation.Parameters = new List<OpenApiParameter>();

            operation.Parameters.Add(new OpenApiParameter
            {
                Name = "X-Version",
                In = ParameterLocation.Header,
                Required = false,                
            });           
        }
    }
}