SqlServer关于“无法删除数据库 "XXXX"，因为该数据库当前正在使用”问题的解决方案

USE [master] ALTER DATABASE [数据库名] SET SINGLE_USER WITH ROLLBACK IMMEDIATE DROP DATABASE [数据库名]

 public static bool DeleteSqlServerDB(string serverCon, string dbName)
        {
            bool bSuccess = false;
            try
            {
                using (SqlConnection conMaster = new SqlConnection(serverCon))
                {
                    conMaster.Open();
                    string strExist = @"select * from dbo.sysdatabases where name=‘" + dbName + @"‘";
                    SqlCommand cmdExist = new SqlCommand(strExist, conMaster);
                    SqlDataReader readerExist = cmdExist.ExecuteReader();
                    bool bExist = readerExist.HasRows;
                    readerExist.Close();
                    if (bExist)
                    {
                        var cmd = new SqlCommand(
                            $" USE [master] ALTER DATABASE [{dbName}] SET  SINGLE_USER WITH ROLLBACK IMMEDIATE DROP DATABASE [{dbName}]",
                            conMaster);
                        cmd.ExecuteNonQuery();
                    }
                    conMaster.Close();
                }
                bSuccess = true;
            }
            catch (Exception e)
            {
                bSuccess = false;
            }
            return bSuccess;
        }