sample1.cs

bool success;
try
{
    // (A) save context first time    
    success = true;
}
catch (Exception)
{
    success = false; // value is not used in any execution path
    throw;
}

if (success) // expression is always true?
{
    // (B) save context second time
}

sample2.cs

bool success = false;
try
{
    // (A) save context first time    
    success = true;
}
finally
{
    if (success) 
    {
        // (B) save context second time
    }
}