Custom Exception Help

I have an application that has several types of custom exceptions.

Each method has several different types of exceptions that they can throw.

The code has 3 steps which are 3 places I want to catch exceptions:

ValidateParameters
Setup Account Info Object (Account service could be offline)
GetAccountInfo (accounInfo server could be down etc)

Just wondering the best way to do this, should I put a try catch block instead of the if statement or should I go ahead and place a try catch within Validate ParamDetails?

The I would assume just a try catch around the other 2 would do the job?

Cheers

//1. Validate Parameters
if (validateViolation1.ValidateParamDetails())
{
//2. Setup Account Info
AccountInfoServices.AccountInfo accountInfo = new AccountInfo();
 
//3. Account Info
accountInfo = accountInfoServices.GetAccountInfo();
 
}

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