使用Entity Framework，如何创建从数据库中获取所有表的列名的查询

public class AppDbContext : DbContext
{
    // 数据库连接字符串
    private const string ConnectionString = "YourConnectionString";

    // 构造函数
    public AppDbContext() : base(ConnectionString)
    {
    }

    // 获取所有表的列名
    public List<string> GetAllTableColumnNames()
    {
        var columnNames = new List<string>();

        // 获取数据库连接
        using (var connection = Database.GetDbConnection())
        {
            connection.Open();

            // 获取数据库架构信息
            var schema = connection.GetSchema("Columns");

            // 遍历所有表的列名
            foreach (DataRow row in schema.Rows)
            {
                var tableName = row["TABLE_NAME"].ToString();
                var columnName = row["COLUMN_NAME"].ToString();

                columnNames.Add(tableName + "." + columnName);
            }
        }

        return columnNames;
    }
}

var dbContext = new AppDbContext();
var columnNames = dbContext.GetAllTableColumnNames();

foreach (var columnName in columnNames)
{
    Console.WriteLine(columnName);
}