Best way to remove the last character from a string built with stringbuilder

Question

I have the following

data.AppendFormat(\"{0},\",dataToAppend);

The problem with this is that I am using it in a loop and there will be a t

Answer 1

Use the following after the loop.

.TrimEnd(',')

or simply change to

string commaSeparatedList = input.Aggregate((a, x) => a + ", " + x)