麻烦帮我转换成C#语法!

Delphi(Pascal) code

function VKB_param(VirtualKey:Integer;flag:Integer):Integer; //函数名vars,Firstbyte,Secondbyte:String;S_code:Integer;Beginif flag=1 then  //按下键  begin  Firstbyte :='00'  endelse                  //弹起键  begin  Firstbyte :='C0'  end;S_code:= MapVirtualKey(VirtualKey, 0);Secondbyte:='00'+inttostr(s_code);Secondbyte:=copy(Secondbyte,Length(Secondbyte)-1,2);s:='$'+Firstbyte + Secondbyte + '0001';Result:=strtoint(s);End;

转换成C#

[解决办法]
public int VKB_param(int VirtualKey,int flag)
{
string s,Firstbyte,Secondbyte;
s=Firstbyte=Secondbyte=string.Empty;
int S_code;
if(flag==1)
{
Firstbyte="00";
}else
{
Firstbyte="C0";
}
S_code=MapVirtualKey(VirtualKey, 0);
Secondbyte="00"+S_code;
Secondbyte=Secondbyte.Substring(Secondbyte.Length-1,2);
s="$"+Firstbyte+Secondbyte+"0001";
return Convert.ToInt32(s);

}

不一定正确，Convert.ToInt32(s);这个没搞定白delphi为什么可以转换，c#好像不行。