String.Format对十进制值的阻塞？

Question

我希望下面的两个测试(为NUnit编写)都能通过,但是Decimal版本失败了,"System.FormatException:Format说明符无效",Double版本也是如此.我无法弄清楚为什么.有人可以光明吗？

谢谢; 邓肯

[Test]
public void Integer_Format_Hex()
{
    //Assume
    Int32 myValue = 11101110;

    //Arrange

    //Act

    //Assert
    Assert.That( String.Format( "0x{0:X8}" , myValue ) , Is.EqualTo( "0x00A963B6" ) );
}

[Test]
public void Decimal_Format_Hex()
{
    //Assume
    Decimal myValue = 11101110m;

    //Arrange

    //Act

    //Assert
    Assert.That( String.Format( "0x{0:X8}" , myValue ) , Is.EqualTo( "0x00A963B6" ) );
}

[Test]
public void Decimal_Format_Hex2()
{
    //Assume
    Decimal myValue = 11101110m;

    //Arrange

    //Act

    //Assert
    Assert.That( myValue.ToString( "X" ) , Is.EqualTo( "00A963B6" ) );
}

Answer 1

来自http://msdn.microsoft.com/en-us/library/fzeeb5cd(v=VS.90).aspx

"格式参数可以是任何有效的标准数字格式说明符,但D,R和X除外 ...."

真棒.