private static NameValuePair ParseInternal(
IDictionary <string, string> parsetable,
string connectionString,
IList <string> validKeywords)
{
StringBuilder buffer = new StringBuilder();
NameValuePair nameValuePair1 = (NameValuePair)null;
NameValuePair nameValuePair2 = (NameValuePair)null;
int num = 0;
int length = connectionString.Length;
while (num < length)
{
int currentPosition = num;
string keyname;
string keyvalue;
num = DbConnectionOptions.GetKeyValuePair(connectionString, currentPosition, buffer, out keyname, out keyvalue);
if (!string.IsNullOrEmpty(keyname))
{
if (!validKeywords.Contains(keyname))
{
throw new ArgumentException(Strings.ADP_KeywordNotSupported((object)keyname));
}
parsetable[keyname] = keyvalue;
if (nameValuePair1 != null)
{
nameValuePair1 = nameValuePair1.Next = new NameValuePair();
}
else
{
nameValuePair2 = nameValuePair1 = new NameValuePair();
}
}
else
{
break;
}
}
return(nameValuePair2);
}
