Replace IFormFile with parameter for uploading file via Swagger

FileOperationFilter.cs

using Microsoft.AspNetCore.Http;
using Swashbuckle.AspNetCore.Swagger;
using Swashbuckle.AspNetCore.SwaggerGen;
using System;
using System.Linq;
using System.Reflection;

namespace Api.Filters
{
    public class FileOperationFilter : IOperationFilter
    {
        public void Apply(Operation operation, OperationFilterContext context)
        {
            foreach (var actionParam in context.ApiDescription.ActionDescriptor.Parameters)
            {
                var paramName =
                    actionParam.ParameterType == typeof(IFormFile) ?
                    actionParam.Name : // passed directly as param in method of action
                    actionParam.ParameterType // passed as model with property of IFormFile
                        .GetProperties(BindingFlags.Public | BindingFlags.Instance)
                        .FirstOrDefault(p => p.PropertyType == typeof(IFormFile))
                        ?.Name;

                if (paramName == null) continue;

                var operationParam = operation.Parameters
                    .FirstOrDefault(p => p.Name.Equals(paramName, StringComparison.OrdinalIgnoreCase));
                if (operationParam == null) continue;

                // remove parameter
                operation.Parameters.Remove(operationParam);

                // insert modified
                var fileParam = new NonBodyParameter
                {
                    Type = "file",
                    In = "formData",
                    Description = operationParam.Description,
                    Name = operationParam.Name,
                    Required = operationParam.Required,
                };
                operation.Parameters.Add(fileParam);
                operation.Consumes.Add("multipart/form-data");
            }
        }
    }
}