search load and replace data from .txt file to and display it in C#
<p>how can I search load and replace data from .txt file to and display it</p>

<p>my data in txt.file is</p>

<pre><code>1010w23#Mild#UnknwonStreet#001234521
</code></pre>

<p>and I want to change it with this</p>

<pre><code>1010w34#Mild#UnknownStreet#001235421
</code></pre>

<p>I amusing windows form application and I'm new in C#</p>

<p>My save data using this</p>

<pre><code>string[] dataEmployee = new string[4];

dataEmployee[0] = txtIdEmployee.Text;
dataEmployee[1] = txtName.Text;
dataEmployee[2] = txtAddress.Text;
dataEmployee[3] = txtContact.Text;

string.Join("#", dataEmployee);

TextWriter writeDataEmployee = new StreamWriter(@"dataemployee.txt", true);
</code></pre>
