Removes attributes that do not exist in the system anymore, from the solution

SolutionExportFixer.cs

        static void Main(string[] args)
        {
            var solutionUniqueName = "SOLUTIONNAME";
            var orgService = new CrmServiceClient(ConfigurationManager.ConnectionStrings["CRM"].ConnectionString);
            var solutionComponentQuery = new QueryExpression("solutioncomponent");
            solutionComponentQuery.Distinct = true;
            solutionComponentQuery.ColumnSet.AddColumns("objectid", "componenttype", "solutioncomponentid");
            var solutioncomponentSolutionLink = solutionComponentQuery.AddLink("solution", "solutionid", "solutionid");
            solutioncomponentSolutionLink.EntityAlias = "aa";
            solutioncomponentSolutionLink.LinkCriteria.AddCondition("uniquename", ConditionOperator.Equal, solutionUniqueName);

            var results = orgService.RetrieveMultiple(solutionComponentQuery);
            foreach (var item in results.Entities)
            {
                if(item.GetAttributeValue<OptionSetValue>("componenttype").Value == 2)
                {
                    var attributeRequest = new RetrieveAttributeRequest
                    {
                        MetadataId = item.GetAttributeValue<Guid>("objectid")
                    };

                    try
                    {
                        var result = (RetrieveAttributeResponse)orgService.Execute(attributeRequest);
                        Console.WriteLine(result.AttributeMetadata.LogicalName);
                    }
                    catch
                    {
                        //attribute is missing, remove it from solution
                        Console.WriteLine($"Attribute {attributeRequest.MetadataId} is missing. Removing from the solution.");
                        var removeSolutionComponent = new RemoveSolutionComponentRequest()
                        {
                            ComponentId = item.GetAttributeValue<Guid>("objectid"),
                            ComponentType = item.GetAttributeValue<OptionSetValue>("componenttype").Value,
                            SolutionUniqueName = solutionUniqueName
                        };

                        orgService.Execute(removeSolutionComponent);
                    }
                }
            }
        }