ARCed.Scintilla.FindReplaceDialog.btnReplaceAll_Click C# (CSharp) Method

        private void btnReplaceAll_Click(object sender, EventArgs e)
        {
            if (this.cboFindR.Text == string.Empty)
                return;

            this.lblStatus.Text = string.Empty;

            List<Range> foundRanges = null;

            if (this.rdoRegexR.Checked)
            {
                Regex rr = null;
                try
                {
                    rr = new Regex(this.cboFindR.Text, this.GetRegexOptions());
                }
                catch (ArgumentException ex)
                {
                    this.lblStatus.Text = "Error in Regular Expression: " + ex.Message;
                    return;
                }

                if (this.chkSearchSelectionR.Checked)
                {
                    if (this._searchRange == null)
                    {
                        this._searchRange = this.Scintilla.Selection.Range;
                    }

                    foundRanges = this.Scintilla.FindReplace.ReplaceAll(this._searchRange, rr, this.cboReplace.Text);
                }
                else
                {
                    this._searchRange = null;
                    foundRanges = this.Scintilla.FindReplace.ReplaceAll(rr, this.cboReplace.Text);
                }
            }
            else
            {
                if (this.chkSearchSelectionR.Checked)
                {
                    if (this._searchRange == null)
                        this._searchRange = this.Scintilla.Selection.Range;

                    foundRanges = this.Scintilla.FindReplace.ReplaceAll(this._searchRange, this.cboFindR.Text, this.cboReplace.Text, this.GetSearchFlags());
                }
                else
                {
                    this._searchRange = null;
                    foundRanges = this.Scintilla.FindReplace.ReplaceAll(this.cboFindR.Text, this.cboReplace.Text, this.GetSearchFlags());
                }
            }

            this.lblStatus.Text = "Total Replaced: " + foundRanges.Count.ToString();
        }