使用CredentialManagement 来管理windows凭证,实现添加,检查,删除
CredentialManagement 包地址:https://www.nuget.org/packages/CredentialManagement

using CredentialManagement;
 public class CredentialHelper
    {
        public static bool SaveInWindowsCredentialManager(string Path, string name,string password)
        {
            using (var saved = new Credential(
                           string.Empty,
                           password,
                           Path,
                           CredentialType.DomainPassword)
                   {
                       PersistanceType = PersistanceType.LocalComputer 
                       ,Username = name
                   })
            {
              return saved.Save();
            }
        }
        public static void DeleteFromWindowsCredentialManager(string Path)
        {
            using (var credential = new Credential
            {
                Target = Path,
                Type = CredentialType.DomainPassword
            })
            {                
                if (credential.Exists())
                {                    
                    credential.Delete();  
                }
            }
        }

        public static string GetFromWindowsCredentialManager(string Path)
        {
            using (var credential = new Credential
                   {
                       Target = Path,
                       Type = CredentialType.DomainPassword
            })
            {
                credential.Load();
                return credential.Exists() ? credential.Password : null;
            }
        }
        }
        }