Uploading the file to sharepoint and automatically check in the the file after upload using WebClient

Uploading the file to Sharepoint by using webclient PUT method its getting uploaded but checked out in my name.How we can checked in the file automatically??

Please suggest me how to fix the issue Below is the code wich upload the file to sharepoint.

public void UploadToSharepoint()
        {

                GC.Collect();
                GC.WaitForPendingFinalizers();

                var site = string.Empty;
                var serviceAccountUsername = string.Empty;
                var serviceAccountPassword = string.Empty;
                var serviceAccountDomain = string.Empty;

                var documentToUpload = ConfigurationManager.AppSettings[AppConstants.DocumentToUpload].ToString();
                var documentLibrary = ConfigurationManager.AppSettings[AppConstants.documentLibrary].ToString();

                int year = DateTime.Now.Year;
                int month = DateTime.Now.Month;

                var targetDocumentName = year + "_" + month + "_ABCD.xlsx";

                if (!System.IO.File.Exists(documentToUpload))
                    throw new FileNotFoundException("File Not Found", documentToUpload);

                using (var client = new WebClient())
                {
                    client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");

                    site = ConfigurationManager.AppSettings[AppConstants.SiteUrl].ToString();

                    serviceAccountUsername = ConfigurationManager.AppSettings[AppConstants.ServiceAccountUsername].ToString();
                    serviceAccountPassword = ConfigurationManager.AppSettings[AppConstants.ServiceAccountPassword].ToString();
                    serviceAccountDomain = ConfigurationManager.AppSettings[AppConstants.ServiceAccountDomain].ToString();

                    if (!client.UseDefaultCredentials)
                    {
                        var networkCredential = new NetworkCredential
                        {
                            Domain = serviceAccountDomain,
                            UserName = serviceAccountUsername,
                            Password = serviceAccountPassword
                        };

                        client.Credentials = networkCredential;
                    }

                    var bytes = System.IO.File.ReadAllBytes(documentToUpload);
                    var uri = new Uri(String.Format("{0}/{1}/{2}", site, documentLibrary, targetDocumentName));

                    client.UploadData(uri, "PUT", bytes);
                }

                GC.Collect();
                GC.WaitForPendingFinalizers();
            }