Sharepoint login via apppool user in .Net application

I am using .net for my web application, and by hardcode username password. Sharepoint site is easily accessible.

But now i want to make some changes in application so need to login into sharepoint without passing hardcoded username and password.

Is it possible to comnect sharepoint and fetch file details by web application without passing hardcoded credentials.

** Basically my apppool user is having access for sharepoint path that i want to read file.andi want to login into sharepoint via appool user, without passing hardcoded credentials. **

Code snippet i tried but did not work :

 using (var ctx = new ClientContext(siteUrl)) { ctx.Credentials = (CredentialCache.DefaultCredentials) as SharePointOnlineCredentials; Microsoft.SharePoint.Client.Web web = ctx.Web; ctx.Load(web); ctx.ExecuteQuery(); } 

Code snippet i tried but did not work

 using (var ctx = new ClientContext(siteUrl)) { CredentialCache credCache = new CredentialCache(); credCache.Add(new Uri(siteUrl), "NTLM", CredentialCache.DefaultNetworkCredentials); ctx.Credentials = credCache; ctx.AuthenticationMode = ClientAuthenticationMode.Default; Microsoft.SharePoint.Client.Web web = ctx.Web; ctx.Load(web); ctx.ExecuteQuery(); } 

Code snippet i tried but did not work

 using (var ctx = new ClientContext(siteUrl)) { ctx.Credentials = CredentialCache.DefaultNetworkCredentials; ctx.AuthenticationMode = ClientAuthenticationMode.Default; Microsoft.SharePoint.Client.Web web = ctx.Web; ctx.Load(web); ctx.ExecuteQuery(); } 

Please help

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