[PersistenceModeAttribute(PersistenceMode.InnerProperty)]
public string Content { get; set; }

<PersistenceModeAttribute(PersistenceMode.InnerProperty)> 
Public Property Content As String
	Get
	Set

public:
[PersistenceModeAttribute(PersistenceMode::InnerProperty)]
property String^ Content {
	String^ get ();
	void set (String^ value);
}

[<PersistenceModeAttribute(PersistenceMode.InnerProperty)>]
member Content : string with get, set

Property Value

The text returned by this property contains HTML markup. If only the text is needed use the Text property.

You can also set the text content of the KaxEditor inline between the <Content></Content> tags. In this case setting this property in the code behind will override the inline content.

<kaxe:KaxEditor id="KaxEditor1" runat="server" >
<Content>
Kettic KaxEditor<br>
the best <span style="COLOR: red">html editor</span> in the world
</Content>
</kaxe:KaxEditor>
<asp:button id="btnSave" runat="server" text="Submit" onclick="btnSave_Click" /><br />
Content:<asp:label runat="server" id="LabelContent"></asp:label><br />
Text:<asp:label runat="server" id="LabelText"></asp:label><br />

Private Sub btnSave_Click(sender As Object, e As System.EventArgs)
    'HtmlEncode the content of the editor to display the HTML tags
    LabelContent.Text = Server.HtmlEncode(KaxEditor1.Content);
    LabelText.Text = Server.HtmlEncode(KaxEditor1.Text);
End Sub

private void btnSave_Click(object sender, System.EventArgs e)
{
    //HtmlEncode the content of the editor to display the HTML tags
    LabelContent.Text = Server.HtmlEncode(KaxEditor1.Content);
    LabelText.Text = Server.HtmlEncode(KaxEditor1.Text);
}

Reference