如何防止在文本文件中覆盖？

Question

我在下面的代码中遇到了问题。它应该防止覆盖文本文件中的记录。我的代码是这样的：

public static void WritingMethod() 
    { 

    StreamWriter Sw = new StreamWriter("fileone.txt", true); 
    string output = string.Format("Thank you for registration! Your Submitted information are:" + Environment.NewLine + "Name: {0}" 
    + Environment.NewLine + "ID: {1}" + Environment.NewLine + "Age: {2}" + Environment.NewLine + "E-mail: {3}", Name, ID, Age, Email); 
    // I using the Environment.NewLine to insert new lines 
    Console.WriteLine(output);  
    Sw.WriteLine(output + Environment.NewLine); 

    Sw.Close(); 

} 

它覆盖记录。我想添加记录，而不是覆盖它。

Answer 1

打开StreamWriter使用File.AppendText：

using (StreamWriter Sw = File.AppendText("fileone.txt")) 
{ 
    string output = string.Format("Thank you for registration! Your Submitted information are:" + Environment.NewLine + "Name: {0}" 
    + Environment.NewLine + "ID: {1}" + Environment.NewLine + "Age: {2}" + Environment.NewLine + "E-mail: {3}", Name, ID, Age, Email); 

    Console.WriteLine(output);  
    Sw.WriteLine(output + Environment.NewLine); 
}