public event SetInitialDashboardStateWpfEventHandler SetInitialDashboardState

Public Event SetInitialDashboardState As SetInitialDashboardStateWpfEventHandler

using DevExpress.DashboardCommon;
using System;
using System.Windows;
using System.Xml.Linq;

namespace WpfDashboard_DashboardState
{
    public partial class MainWindow : Window
    {
        public static readonly string PropertyName = "DashboardState";

        public MainWindow()
        {
            InitializeComponent();
        }

        DashboardState GetDataFromString(string customPropertyValue){
            DashboardState dState = new DashboardState();
            if(!string.IsNullOrEmpty(customPropertyValue)) {
                var xmlStateEl = XDocument.Parse(customPropertyValue);
                dState.LoadFromXml(xmlStateEl);
            }
            return dState;
        }

        private void dashboardControl_SetInitialDashboardState(object sender, DevExpress.DashboardWpf.SetInitialDashboardStateWpfEventArgs e){
            var state = GetDataFromString(dashboardControl.Dashboard.CustomProperties.GetValue(PropertyName));
            e.InitialState = state;
        }
     }
}       
//...

Imports DevExpress.DashboardCommon
Imports System
Imports System.Windows
Imports System.Xml.Linq

Namespace WpfDashboard_DashboardState
    Partial Public Class MainWindow
        Inherits Window
        Public Shared ReadOnly PropertyName As String = "DashboardState"

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Function GetDataFromString(ByVal customPropertyValue As String) As DashboardState
            Dim dState As New DashboardState()
            If (Not String.IsNullOrEmpty(customPropertyValue)) Then
                Dim xmlStateEl = XDocument.Parse(customPropertyValue)
                dState.LoadFromXml(xmlStateEl)
            End If
            Return dState
        End Function

        Private Sub dashboardControl_SetInitialDashboardState(ByVal sender As Object, ByVal e As DevExpress.DashboardWpf.SetInitialDashboardStateWpfEventArgs)
            Dim state = GetDataFromString(dashboardControl.Dashboard.CustomProperties.GetValue(PropertyName))
            e.InitialState = state
        End Sub
    End Class
End Namespace
'...

DashboardSource="SampleDashboardWithState.xml"
        SetInitialDashboardState="dashboardControl_SetInitialDashboardState"/>
</Grid>

#line 20 "..\..\..\MainWindow.xaml"
this.dashboardControl.SetInitialDashboardState += new DevExpress.DashboardWpf.SetInitialDashboardStateWpfEventHandler(this.dashboardControl_SetInitialDashboardState);

#ExternalSource("..\..\..\MainWindow.xaml",20)
AddHandler Me.dashboardControl.SetInitialDashboardState, New DevExpress.DashboardWpf.SetInitialDashboardStateWpfEventHandler(AddressOf Me.dashboardControl_SetInitialDashboardState)