Removing a character from my stringbuilder [duplicate]

Question

I am having the following string builder as msrtResult, which is quite long:

mstrResult.Append(rtbResult.Text).Append("})})" + Environment.NewLine) 

How can I remove the last "," from mstrResult Now? (it is in the middle of that mstrResult and it is not the last character of the whole string since I am appending strings to it) I should do it before adding the newline. Thanks

Answer 1

You can just decrease the length to shorten the string (C#):

mstrResult.Length -= 1; 

EDIT:

After you updated you question, I think I know what you want :) How about this:

mstrResult.Append(rtbResult.Text).Append("})})" + Environment.NewLine); var index = mstrResult.ToString().LastIndexOf(','); if (index >= 0)     mstrResult.Remove(index, 1); 

Answer 2

Add a StringBuilder extension.

public static StringBuilder RemoveLast(this StringBuilder sb, string value) {     if(sb.Length < 1) return sb;     sb.Remove(sb.ToString().LastIndexOf(value), value.Length);     return sb; } 

then invoke:

yourStringBuilder.RemoveLast(",");