Optimization ???

[rumbu]

D version of to!string(uint):

size_t index = 12;
char[12] buffer = void;
uint div = void;
uint mod = void;
char baseChar = 'A';
do {
    div = cast(uint)(mValue / 10);
    mod = mValue % 10 + '0';
    buffer[--index] = cast(char)mod;
    mValue = div;
} while (mValue);
return cast(string)buffer[index .. $].dup;

C# version of uint.ToString() (in fact Int32ToDecChars written in 
C++):

//p is a reusable buffer;
wchar_t* COMNumber::Int32ToDecChars(wchar_t* p, unsigned int 
value, int digits)
{
     while (--digits >= 0 || value != 0) {
         *--p = value % 10 + '0';
         value /= 10;
     }
     return p;
}
//COMString::NewString(p,...) is called afterwards to obtain a c# 
string.