Problem:

Recently I started facing this issue.

Whenever, I load the PowerShell ISE and Type the command to load the SharePoint PowerShell module, it starts throwing error

“The local farm is not accessible. Cmdlets with FeatureDependencyId are not registered.”

The same error comes up in the SharePoint Management Shell.

Solution:

You have someone who has the rights to run powershell add your user as SP Shell Admin.

Add-SPShellAdmin -username DOMAIN\YourUser

That's quite the nobrainer, but what happens if your user is already SPShellAdmin, shown with Get-SPShellAdmin and you get the same error popping up? In that case, something probably happened with the SQL. They restored the farm on another server and did not migrate all the access rights. Just run Add-SPShellAdmin -username DOMAIN\YourUser again and it will set the appropriate permissions.

I have to compare the User value in the Assigned To Field of the List with the other User value.
Here is the exact code that will do this.

SPUser spUser = GetSPUserOne();
SPUser spPrevUser = GetSPUserTwo();

For Windows Authentication This will do

if(spUser.Sid.Equals(spPrevUser.Sid))
{
…..
}

For FBA you have to follow this

if(spUser.UserToken.CompareUser(spPrevUser.UserToken))
{
…..
}