麻烦帮小弟我转换成C#语法

麻烦帮我转换成C#语法!
Delphi(Pascal) code



function VKB_param(VirtualKey:Integer;flag:Integer):Integer; //函数名
var
s,Firstbyte,Secondbyte:String;
S_code:Integer;
Begin
if flag=1 then  //按下键
  begin
  Firstbyte :='00'
  end
else                  //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#

------解决方案--------------------
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。