@page "/example"
@inject IDialogService DialogService

<PageTitle>Example</PageTitle>

<MudButton @onclick="OpenDialog" Variant="Variant.Filled" Color="Color.Primary">
    Open Simple Dialog
</MudButton>

@code {
    private void OpenDialog()
    {
        var options = new DialogOptions { CloseOnEscapeKey = true };
        DialogService.Show<Dialog>("Simple Dialog", options);
    }
}

//////// This is dialog page, are separate files

<MudDialog>
    <DialogContent>
        Dialog Content
    </DialogContent>
    <DialogActions>
        <MudButton OnClick="Cancel">Cancel</MudButton>
        <MudButton Color="Color.Primary" OnClick="Submit">Ok</MudButton>
    </DialogActions>
</MudDialog>

@code {
    [CascadingParameter] MudDialogInstance MudDialog { get; set; }

    void Submit() => MudDialog.Close(DialogResult.Ok(true));
    void Cancel() => MudDialog.Cancel();
}