类与类之间的传值
public class A : AbstractDataGateway
{
private BranchCorpGateWay Instance = new BranchCorpGateWay();
}

public class B : DataModelBase
{
}
现在要在b里面调用Instance，请问该怎么办？
注：不能用静态方法。

[解决办法]
public class A : AbstractDataGateway
{
public BranchCorpGateWay Instance = new BranchCorpGateWay();
}

public class B : DataModelBase
{
A myA = new A();
myA.Instance ......
}