c# – 无法使用Gtk Builder加载glade文件. Gtk3#

当我尝试使用带有Gtk#的GTK Builder来加载glade文件时,会抛出一个异常,即文件必须以元素开头.

错误：

GLib.GException has been thrown
Error on line 1 char 1: Document must begin with an element 
(e.g. <book>)

MainWindow.glade：

<?xml version="1.0" encoding="UTF-8"?>
<interface>
    <requires lib="gtk+" version="3.0" />
    <object class="GtkWindow" id="window1">
        <property name="can_focus">False</property>
        <child>
            <object class="GtkBox" id="box1">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="orientation">vertical</property>
                <child>
                    <object class="GtkLabel" id="label1">
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="yalign">0.47999998927116394</property>
                        <property name="label" translatable="yes">Hello World! This button has been clicked 0 time(s).</property>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">0</property>
                    </packing>
                </child>
                <child>
                    <object class="GtkButton" id="button1">
                        <property name="label" translatable="yes">Click me!</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="receives_default">True</property>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">1</property>
                    </packing>
                </child>
            </object>
        </child>
    </object>
</interface>

MainWindow.cs：

using System;
using Gtk;
using UI = Gtk.Builder.ObjectAttribute;

public partial class MainWindow: Gtk.Window
{
    Builder builder;

    [UI] Gtk.Button button1;
    [UI] Gtk.Label label1;

    int clickedTimes;

    public static MainWindow Create ()
    {
        Builder builder = new Builder (null,"DiscordEditor.interfaces.MainWindow.glade",null);
        return new MainWindow (builder,builder.GetObject ("window1").Handle);
    }

    protected MainWindow (Builder builder,IntPtr handle) : base (handle)
    {
        this.builder = builder;

        builder.Autoconnect (this);
        DeleteEvent += OnDeleteEvent;

        button1.Clicked += onButtonClick;
    }

    protected void onButtonClick (object sender,EventArgs a)
    {
        clickedTimes++;
        label1.Text = string.Format ("Hello World! This button has been clicked {0} time(s).",clickedTimes);
    }

    protected void OnDeleteEvent (object sender,DeleteEventArgs a)
    {
        Application.Quit ();
        a.RetVal = true;
    }
}

我不明白为什么会发生这种情况,除非它是GTK#3的一个错误,因为它尚未完全发布.我真的想用GTK3代替GTK2,所以有人会建议吗？

编辑：我通过打开生成的文件并将其保存为GTKBuilder格式来修复它.