Removing form data from browser request header and body

Question

Hello All,

 

My Application is in .net c# . Here, when I inspect the code through Inspect Element(F12) in Browser through Network-->Request Body all the controls present on the form appears with its id and value.

 

"__EVENTTARGET=&__EVENTARGUMENT=&__LASTFOCUS=&__VIEWSTATE=%2FwEPDwUJODg3MDE1MDc2ZGTdZioHFRPoLKiubA%2BiDem%2BWiJ9vNuFHpqt6QlXXKiEhQ%3D%3D&txtUserName1=alice&HDusername=N9KT5fIpF7JNTpxzRLgz3w%3D%3D&txtPassword1=alice%40123&HDPassword=JRj7S1aHmZom2g1DQeRuVw%3D%3D&HDUserID=sFApVk1Bg7DlT8aQ59D%2FYQ%3D%3D&txtuserid=N9KT5fIpF7JNTpxzRLgz3w%3D%3D&btnAlertOk=OK&__VIEWSTATEGENERATOR=F1116BC1"

 

I don't want this to be visible because of security reasons.

 

Please help me how can i achieve this.

 

Thanks In Advance.