如何在不复制逗号或任何其他标点符号的情况下将文本与单词分开

我正在使用下一个代码将文本与单词分开，然后将这些单词插入数据库。问题是逗号也被复制了。如何从逗号跳到复制或任何其他标点符号？

var str = reader1.ReadToEnd();
string[] words = str.Split(' ');   //Insert all the song words into words named string
string constring1 = "datasource=localhost;port=3306;username=root;password=abc";
using (var conDataBase1 = new MySqlConnection(constring1))
{
    conDataBase1.Open();
    for (int i = 0; i < words.Length; i++)
      {
          int numberOfLetters = words[i].ToCharArray().Length; //Calculate the numbers of letters in each word  
          var songtext = "insert into myproject.words (word_text,word_length) values('" + words[i] + "','" + numberOfLetters + "');"; //Insert words list and length into words table
          MySqlCommand cmdDataBase1 = new MySqlCommand(songtext, conDataBase1);
          try
            { 
              cmdDataBase1.ExecuteNonQuery(); 
            }
            catch (Exception ex)
              {
                MessageBox.Show(ex.Message);  
              }
       }
 }

 char [] separators = new char[] {' ', ',', '/'};
 var words = str.Split(separators, StringSplitOptions.RemoveEmptyEntries).ToArray();