关于code first DbContext的问题

[zhujian_1986]

我在一个项目中用到了code first，有多个实体类，是否有必要create多个DbContext？我目前是把所有实体的DbContext放在一个Context中，不知道是否会有性能的影响？如：
Public Class MEIEContext
Inherits DbContext

Public Property Staffs As DbSet(Of MD.Staff)

Public Property Department As DbSet(Of MD.Department)

Public Property EmergencyList As DbSet(Of MD.EmergencyList)

Public Property Location As DbSet(Of MD.Location)

Public Property Equipment As DbSet(Of MD.Equipment)

Public Property EmergencyListHistory As DbSet(Of MD.EmergencyListHistory)

End Class