明明给数据库文件给了读取写入的权限，但是系统还会依然报错，

Microsoft.Data.Sqlite.SqliteException: 'SQLite Error 14: 'unable to open database file

一会说找不到数据库了，一会说打不开数据库了，为了排除问题，直接先给数据库everyone用户所有权限试试，依然报错，如下：
An exception occurred in the database while saving changes for context type 'XXX.Data.DBContext'.
Microsoft.Data.Sqlite.SqliteException (0x80004005): SQLite Error 8: 'attempt to write a readonly database'.
   at Microsoft.Data.Sqlite.SqliteException.ThrowExceptionForRC(Int32 rc, sqlite3 db)
   at Microsoft.Data.Sqlite.SqliteDataReader.NextResult()
   at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader(CommandBehavior behavior)
   at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader()
   at Microsoft.Data.Sqlite.SqliteCommand.ExecuteNonQuery()
   at Microsoft.Data.Sqlite.SqliteConnectionExtensions.ExecuteNonQuery(SqliteConnection connection, String commandText, SqliteParameter[] parameters)
   at Microsoft.Data.Sqlite.SqliteTransaction..ctor(SqliteConnection connection, IsolationLevel isolationLevel, Boolean deferred)
   at Microsoft.Data.Sqlite.SqliteConnection.BeginTransaction(IsolationLevel isolationLevel, Boolean deferred)
   at Microsoft.Data.Sqlite.SqliteConnection.BeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.Data.Sqlite.SqliteConnection.BeginDbTransaction(IsolationLevel isolationLevel)
   at System.Data.Common.DbConnection.BeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.ConnectionBeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction()
   at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.Execute(IEnumerable`1 commandBatches, IRelationalConnection connection)
   at Microsoft.EntityFrameworkCore.Storage.RelationalDatabase.SaveChanges(IList`1 entries)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(IList`1 entriesToSave)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(StateManager stateManager, Boolean acceptAllChangesOnSuccess)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.<>c.<SaveChanges>b__104_0(DbContext _, ValueTuple`2 t)
   at Microsoft.EntityFrameworkCore.Storage.NonRetryingExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(Boolean acceptAllChangesOnSuccess)
   at Microsoft.EntityFrameworkCore.DbContext.SaveChanges(Boolean acceptAllChangesOnSuccess)

Exception: 
Microsoft.Data.Sqlite.SqliteException (0x80004005): SQLite Error 8: 'attempt to write a readonly database'.
   at Microsoft.Data.Sqlite.SqliteException.ThrowExceptionForRC(Int32 rc, sqlite3 db)
   at Microsoft.Data.Sqlite.SqliteDataReader.NextResult()
   at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader(CommandBehavior behavior)
   at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader()
   at Microsoft.Data.Sqlite.SqliteCommand.ExecuteNonQuery()
   at Microsoft.Data.Sqlite.SqliteConnectionExtensions.ExecuteNonQuery(SqliteConnection connection, String commandText, SqliteParameter[] parameters)
   at Microsoft.Data.Sqlite.SqliteTransaction..ctor(SqliteConnection connection, IsolationLevel isolationLevel, Boolean deferred)
   at Microsoft.Data.Sqlite.SqliteConnection.BeginTransaction(IsolationLevel isolationLevel, Boolean deferred)
   at Microsoft.Data.Sqlite.SqliteConnection.BeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.Data.Sqlite.SqliteConnection.BeginDbTransaction(IsolationLevel isolationLevel)
   at System.Data.Common.DbConnection.BeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.ConnectionBeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction(IsolationLevel isolationLevel)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.BeginTransaction()
   at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.Execute(IEnumerable`1 commandBatches, IRelationalConnection connection)
   at Microsoft.EntityFrameworkCore.Storage.RelationalDatabase.SaveChanges(IList`1 entries)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(IList`1 entriesToSave)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(StateManager stateManager, Boolean acceptAllChangesOnSuccess)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.<>c.<SaveChanges>b__104_0(DbContext _, ValueTuple`2 t)
   at Microsoft.EntityFrameworkCore.Storage.NonRetryingExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(Boolean acceptAllChangesOnSuccess)
   at Microsoft.EntityFrameworkCore.DbContext.SaveChanges(Boolean acceptAllChangesOnSuccess)

    还说你的数据库是只读的，我已经给数据库文件EVERYONE用户所有的权限了，还报这个错误，不得不吐槽一下微软的权限设计问题了。。。。 其实，这种错误一般是数据库所在的目录没有写入权限引起的，你光给数据库权限是不够的。但是如果给整个目录给写入的权限，那又太危险了，所以为了解决这个问题，一般可以新建一个子目录，把数据 库放进去，再给子目录和数据库授权即可