C # String.Format JSON string FormatException error

The normal string of the String.Format is fine, but when stitching the JSON string because it contains the {} curly braces and nested {0} {1} {2} These are the keywords to be replaced, the error will be made.

After Baidu.

The string contains {or}, you need to use {{To replace the character {,}} instead}

  stringStrtemplate ="{{\ "c0061_code\": \ "{0}\", \ "c0061_name\": \ "{1}\", \ "c0010_scode\": \ "{2}\", \ "c0010_sname\": \ "{3}\", \ "type\": \ "{4}\"}},";//SB1. AppendFormat (Strtemplate, row["C0061_code"]. ToString (), row["C0061_name"]. ToString (), row["C0010_scode"]. ToString (), row["C0010_sname"]. ToString (), row["C0061_type"]. ToString ());

C # String.Format JSON string FormatException error