可以写一个部分类

public partial class eBuulMCEntities {     public eBuulMCEntities(int? commandTimeout)  : base("name=eBuulMCEntities")           {             // Get the ObjectContext related to this DbContext                              var objectContext = (this as IObjectContextAdapter).ObjectContext;                  // Sets the command timeout for all the commands                              objectContext.CommandTimeout = commandTimeout;           }  }