how to keep a line break in String.Format

hi
i have this line of code..
how can i keep linebreak {0} and {1}
here is my code
foreach (DataRow dr in dt.Tables[0].Rows) { stb.Append(String.Format(@"<vc:DataPoint LabelText=""{0}{1}(#Percentage%)"" YValue=""{1}"" ToolTipText=""{0},{1}(#Percentage%)"" Tag=""{0}""/>", dr["CATE"], dr["TOT"])); }

thank you
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