title: C# - If New DataGridView Has Same Rows With Other DataGridView
body: <p>I have 2 DataGridViews. After doing some operations in my first DataGridView, I transfer the rows ​​to my second DataGridView. Now, I want to do this. In my second DataGridView, I don't want to add rows that are the same as the first DataGridView.</p>
  
  <p>My DataGridView1 looks like that:</p>
  
  <pre><code>                Column 1                Column2
             ---------------------------------------
                 hello friends              250
                 hi guys                    15
                 good day                   15684
                 old days                   156153
                 bye bye                    6143
  </code></pre>
  
  <p>If my DataGridView2 has;</p>
  
  <pre><code>              hello friends               250
                bye bye                     6143
  </code></pre>
  
  <p>I don't want to add these rows.</p>
  
  <p>It's my adding code:</p>
  
  <pre><code>      foreach (DataRow r in d.Rows)
        {
            dgw.Rows.Add(r["firstColumnFromMySQLTable"].ToString() + " " + r["secondColumnFromMySQLTable"].ToString(), r["thirdColumnFromMySQLTable"]);
        }
  </code></pre>
  
  <p>Thank you for answers.</p>