boolean type checkbox checked unchecked in MVC

Question

In my project some table field like GST_No , isGST_no etc.

 

in SQL server database

GST_No  nvarchar(100),

isGST_no  bit

 

in Moldels.

public string GST_No { get; set; }

public Boolean isGST_no { get; set; }

 

so when i write GST_No in create part then after automatically isGST checked checkbox and delete GST_No then unchecked automatically. How it possible ?

 

please give me answer for ONLY MVC not for simple asp

 

 

Thanx