C++ versus C#

short MES_EditConfig(char *Detail, char *aParameter)
{
FILE 	*fp;
char 	*fData;
char	fTemp[80];
char 	prjdef[512];
long 	FileSize;

char 	sString[500];
long 	sIndx;
char 	*strCmp;
long 	sCnt;
char 	str_newDetail[50];
int 	len_newDetail;

int 	ErrorFlag=0;

char 	*strA, *strC;

GetProjectDir(prjdef);
sprintf(fTemp  , "%s\\Config.ini", prjdef);

FileSize = GetFileData(fTemp, &fData);
sIndx=0;
sCnt=0;
strCmp = fData;

sprintf(str_newDetail, "%s%s\n", Detail, aParameter);
len_newDetail = strlen(str_newDetail);

while(sCnt<filesize-1)>
{
	while(fData[sCnt]!=10 && sCnt<filesize-1)>
		sCnt++;
	
	CopyString(sString, 0, fData, sIndx, sCnt - sIndx);
	
	if(!strncmp(sString, Detail, strlen(Detail)))
	{
		strA = malloc(sIndx+1);
		strC = malloc(FileSize-sIndx);
			
		CopyString(strA, 0, fData, 0, sIndx);
		CopyString(strC, 0, fData, sCnt+1, -1);
		sprintf(fData, "%s%s%s", strA, str_newDetail, strC);
		
		ErrorFlag=1;
	}
		
	sCnt++;
	sIndx = sCnt;
}

fp = fopen(fTemp, "w");
fputs(fData, fp);
fclose(fp);
return ErrorFlag;
}