int iRows = strCSV.Length;
int iColumns = strCSV[0].Split(new char[] { ';' }).Length;

object[,] objData = new object[iRows, iColumns];

string[] strRow;

for (int r = 0; r < iRows; r++)
{
    strRow = strCSV[r].Split(new char[] { ';' });                    

    for (int i = 0; i < iColumns; i++)
    {
	objData[r, i] = strRow.Replace('|', '\n');
    }
}

Excel.Range m_objRange;              

m_objRange = m_objSheet.get_Range("A1", Type.Missing);

m_objRange = m_objRange.get_Resize(iRows, iColumns);

m_objRange.Value = objData;