I have listen that different types of application architectures are running now a days, i want to know about them completely, If some one have any link or any book related to them plz post it here.

I try google but tilll not found any thing useful,
i only found this .NET Application Architecture: the Data Access Layer till now.

Share some thing for better understanding of application architectures.

I am building "Hotel System", i want to make it tottaly organized.
Using VC#, .NET and MY Sql Server for development purpose.

Thanks.

Application Architecture is exactly that, the architecture of an application. This includes the relationships between the components.
Of course each application is different so largely there is a broad range of application architectures.

Perhaps have a look at the Gang of Four books on design patterns as these would help in producing an application architecture for your purposes.