Single quote inside double quote in c#

Question

I want to result like this --- onclick=onclick="report('a1')" --- Please help me 
C#-- Code

strHTML = "<table id='table1'> <colgroup><col width='190'/></colgroup><tbody>";                 for (int i = 0; i < objDs.Tables[0].Rows.Count; i++)                 {                     if (i <= 10)                     {                         strUniqueID = "a" + i;                         strBGColor = "a" + i.ToString();                     }                     else                     {                         strUniqueID = "a" + i;                         strBGColor = "a" + (i - 1);                     }                     strSubject = objDs.Tables[0].Rows[i]["SubjectName"].ToString();                     iSubjectID = Convert.ToInt32(objDs.Tables[0].Rows[i]["Subjectid"]);                       strHTML = strHTML + "<tr><td class='dark'><div id='" + strUniqueID + "' class='drag clone " + strBGColor + "'>" + strSubject + "</div><input id='b_" + strUniqueID + "' class='" + strUniqueID + "' type='button' value='' onclick='report(" + strUniqueID + ")' title='Show only " + strSubject + "'/></td></tr>";                   }                 strHTML = strHTML + "<tr><td class='trash' title='Trash'>Trash</td></tr>";                 strHTML = strHTML + "</tbody></table>";                 left.InnerHtml = strHTML;

---OutPut

English Test P

<input id='b_a0' class='a0' type='button' value='' onclick='report(a0)' title='Show only English Test P'/>

Kunal

<input id='b_a1' class='a1' type='button' value='' onclick='report(a1)' title='Show only Kunal'/>

Kunwar

<input id='b_a2' class='a2' type='button' value='' onclick='report(a2)' title='Show only Kunwar'/>

Maths

<input id='b_a3' class='a3' type='button' value='' onclick='report(a3)' title='Show only Maths'/>

Maths Test

<input id='b_a4' class='a4' type='button' value='' onclick='report(a4)' title='Show only Maths Test'/>

Raj

<input id='b_a5' class='a5' type='button' value='' onclick='report(a5)' title='Show only Raj'/>

Trash