!!!C# 書式
[C#]{{category 書式}}
!!String.Format
!複合書式指定文字列 
 { index[,alignment][:formatString]}
,要素,内容
,index,対応する項目を識別するための 0 から始まる数値
,alignment,省略可能、書式設定フィールドの幅を指定する符号付き整数
,formatString,式設定されるオブジェクトの種類に適した書式指定文字列.指定する場合、コロンが必要

::コード例
 outputBlock.Text += "Standard Numeric Format Specifiers" + "\n";
 s = String.Format(
   "(C) Currency: . . . . . . . . {0:C}\n" +
   "(D) Decimal:. . . . . . . . . {0:D}\n" +
   "(E) Scientific: . . . . . . . {1:E}\n" +
   "(F) Fixed point:. . . . . . . {1:F}\n" +
   "(G) General:. . . . . . . . . {0:G}\n" +
   "    (default):. . . . . . . . {0} (default = 'G')\n" +
   "(N) Number: . . . . . . . . . {0:N}\n" +
   "(P) Percent:. . . . . . . . . {1:P}\n" +
   "(R) Round-trip: . . . . . . . {1:R}\n" +
   "(X) Hexadecimal:. . . . . . . {0:X}\n",
   -123, -123.45f);
 outputBlock.Text += s + "\n";
 
 outputBlock.Text += "Standard DateTime Format Specifiers" + "\n";
 s = String.Format(
   "(d) Short date: . . . . . . . {0:d}\n" +
   "(D) Long date:. . . . . . . . {0:D}\n" +
   "(t) Short time: . . . . . . . {0:t}\n" +
   "(T) Long time:. . . . . . . . {0:T}\n" +
   "(f) Full date/short time: . . {0:f}\n" +
   "(F) Full date/long time:. . . {0:F}\n" +
   "(g) General date/short time:. {0:g}\n" +
   "(G) General date/long time: . {0:G}\n" +
   "    (default):. . . . . . . . {0} (default = 'G')\n" +
   "(M) Month:. . . . . . . . . . {0:M}\n" +
   "(R) RFC1123:. . . . . . . . . {0:R}\n" +
   "(s) Sortable: . . . . . . . . {0:s}\n" +
   "(u) Universal sortable: . . . {0:u} (invariant)\n" +
   "(U) Universal full date/time: {0:U}\n" +
   "(Y) Year: . . . . . . . . . . {0:Y}\n",
   thisDate);
 outputBlock.Text += s + "\n";
 
 outputBlock.Text += "Standard Enumeration Format Specifiers" + "\n";
 s = String.Format(
   "(G) General:. . . . . . . . . {0:G}\n" +
   "    (default):. . . . . . . . {0} (default = 'G')\n" +
   "(F) Flags:. . . . . . . . . . {0:F} (flags or integer)\n" +
   "(D) Decimal number: . . . . . {0:D}\n" +
   "(X) Hexadecimal:. . . . . . . {0:X}\n",
   Color.Green);
 outputBlock.Text += s + "\n";

::出力例
 Standard Numeric Format Specifiers
 (C) Currency: . . . . . . . . ($123.00)
 (D) Decimal:. . . . . . . . . -123
 (E) Scientific: . . . . . . . -1.234500E+002
 (F) Fixed point:. . . . . . . -123.45
 (G) General:. . . . . . . . . -123
     (default):. . . . . . . . -123 (default = 'G')
 (N) Number: . . . . . . . . . -123.00
 (P) Percent:. . . . . . . . . -12,345.00 %
 (R) Round-trip: . . . . . . . -123.45
 (X) Hexadecimal:. . . . . . . FFFFFF85
 
 Standard DateTime Format Specifiers
 (d) Short date: . . . . . . . 6/26/2004
 (D) Long date:. . . . . . . . Saturday, June 26, 2004
 (t) Short time: . . . . . . . 8:11 PM
 (T) Long time:. . . . . . . . 8:11:04 PM
 (f) Full date/short time: . . Saturday, June 26, 2004 8:11 PM
 (F) Full date/long time:. . . Saturday, June 26, 2004 8:11:04 PM
 (g) General date/short time:. 6/26/2004 8:11 PM
 (G) General date/long time: . 6/26/2004 8:11:04 PM
     (default):. . . . . . . . 6/26/2004 8:11:04 PM (default = 'G')
 (M) Month:. . . . . . . . . . June 26
 (R) RFC1123:. . . . . . . . . Sat, 26 Jun 2004 20:11:04 GMT
 (s) Sortable: . . . . . . . . 2004-06-26T20:11:04
 (u) Universal sortable: . . . 2004-06-26 20:11:04Z (invariant)
 (U) Universal full date/time: Sunday, June 27, 2004 3:11:04 AM
 (Y) Year: . . . . . . . . . . June, 2004
 
 Standard Enumeration Format Specifiers
 (G) General:. . . . . . . . . Green
     (default):. . . . . . . . Green (default = 'G')
 (F) Flags:. . . . . . . . . . Green (flags or integer)
 (D) Decimal number: . . . . . 3
 (X) Hexadecimal:. . . . . . . 00000003