System.Text.StringBuilder System.Object StringBuilder new StringBuilder() str System.String new StringBuilder(${str}) Length System.Int32 ${this}.length() ${this}.setlength(${value}) System.Text.StringBuilder Append arg System.Object ${this}.append(${arg}) System.Text.StringBuilder AppendLine arg System.String ${this}.append((${arg}) + System.getProperty("line.separator")) System.Text.StringBuilder Insert idx System.Int32 obj System.Object ${this}.insert(${idx}, ${obj}) System.Text.StringBuilder Replace old System.Char new System.Char ${this}.replace(${old}, ${new}) System.Text.StringBuilder Remove startIndex System.Int32 length System.Int32 ${this}.delete(${startIndex}, (${startIndex})+(${length})) System.String ToString startIndex System.Int32 length System.Int32 ${this}.substring(${startIndex}, (${startIndex})+(${length}))