您可以使用冒号和标准数字格式语法来控制数字的格式。
var decimalValue = 120.5; var asCurrency = $"It costs {decimalValue:C}"; // String value is "It costs $120.50" (depending on your local currency settings) var withThreeDecimalPlaces = $"Exactly {decimalValue:F3}"; // String value is "Exactly 120.500" var integerValue = 57; var prefixedIfNecessary = $"{integerValue:D5}"; // String value is "00057"
.NET Fiddle上的实时演示