在RichTextBox中嵌入文件时（例如通过粘贴），Rtf属性会在之后不断变化。在调试时，您可以在每个步骤中看到属性已更改。
更改仅发生在某些行并且似乎是随机的（有时在100次更改后，有时会在800之后或之间的任何位置再次发生Rtf属性的值）。
由于没有引发任何事件且行为和UI不受影响，因此通常不会出现问题。但是我希望更改部分，因此只要没有实际的更改，Rtf就需要一个稳定的值。
我该如何解决这个问题？
要重现的一些代码：
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.Windows.Forms;
public class RTFForm : Form
{
public RTFForm()
{
RichTextBox rtb = new RichTextBox();
rtb.Dock = DockStyle.Fill;
rtb.EnableAutoDragDrop = true;
this.Controls.Add(rtb);
rtb.Rtf = GetRTFContentFile();
List<string> rtfList = new List<string>();
int changes = 0;
while(!rtfList.Contains(rtb.Rtf))
{
rtfList.Add( rtb.Rtf);
changes++;
}
Debug.Print("changes until repeat: " + changes); //set a breakpoint here. It is eventually reached
string rtf = "";
changes = 0;
while (rtf != rtb.Rtf)
{
rtf = rtb.Rtf;
changes++;
}
Debug.Print("changes until staying equal:" + changes); //set a breakpoint here. It is never reached
}
private string GetRTFContentFile()
{
StringBuilder sb = new StringBuilder();
sb.Append("{\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1031{\\fonttbl{\\f0\\fnil\\fcharset0 Microsoft Sans Serif;}}");
sb.Append("\\viewkind4\\uc1\\pard\\f0\\fs20{\\object\\objemb{\\*\\objclass Package}\\objw615\\objh810{\\*\\objdata ");
sb.Append("01050000");
sb.Append("02000000");
sb.Append("08000000");
sb.Append("5061636b61676500");
sb.Append("00000000");
sb.Append("00000000");
sb.Append("27010000");
sb.Append("020066696c652e74787400433a5c55736572735c6dfc6c6c65725c4465736b746f705c66696c65");
sb.Append("2e74787400000003002d000000433a5c55736572735c4d4c4c45527e315c417070446174615c4c");
sb.Append("6f63616c5c54656d705c66696c652e747874000e0000007468697320697320612066696c652c00");
sb.Append("000043003a005c00550073006500720073005c004d004c004c00450052007e0031005c00410070");
sb.Append("00700044006100740061005c004c006f00630061006c005c00540065006d0070005c0066006900");
sb.Append("6c0065002e0074007800740008000000660069006c0065002e007400780074002000000043003a");
sb.Append("005c00550073006500720073005c006d00fc006c006c00650072005c004400650073006b007400");
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sb.Append("05000000");
sb.Append("0d000000");
sb.Append("4d45544146494c455049435400");
sb.Append("a6050000");
sb.Append("8ff8ffff");
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sb.Append("0800a60571070000");
sb.Append("0100090000033a0700000200210600000000050000000b0200000000050000000c02350028001c");
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