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    <p><code>Did the project compiled without any errors ?</code>. </p> <p>By default every Event Handler in C# is declared as void,which I am unable to find in your code.Did you modify the Event Handlers generated by Visual Studio,if this is the case then the issue you are facing is because of this.</p> <p>Let me explain what would have gone wrong;</p> <p>Whenever you create a Event Handler for any control using the Properties Window of Visual Studio,for the sake of this explanation let me take <code>example of TextBox</code>.Suppose you have a TextBox (named as textBox1,which is default) and you subscribe to its <code>TextChanged Event</code> (to do that locate TextChanged event in the events window of Visual Studio and double click it,when you do that Visual Studio generates this for you;</p> <pre><code>private void textBox1_TextChanged(object sender,EventArgs e) { } </code></pre> <p>This is what we programmers call an <code>Event Handler</code>,now locate <code>Solution Explorer Window in Visual Studio</code> click on <code>Form1.Designer.cs</code> you will get a lot of code there,locate the line which says </p> <p><code>private System.Windows.Forms.TextBox textBox1;</code></p> <p>where textBox1 is the control's name.Locate a plus sign above this point,click it and locate the following code;</p> <pre><code>// // textBox1 // this.textBox1.AcceptsReturn = true; this.textBox1.Location = new System.Drawing.Point(478, 0); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(359, 23); this.textBox1.TabIndex = 1; this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged); </code></pre> <p><code>PS:The Location , AcceptsReturn , Size and TabIndex property in yours might not be same as mine.</code></p> <p>Read the last line of this code,it says;</p> <pre><code>this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged); </code></pre> <p>where <code>textBox1_TextChanged is the name of event which must be same as that defined in Form1.cs.</code>If you modify this you'll get various compile time errors.</p> <p>So now I guess you know what is the relationship between <code>Form1.cs</code>(main code file) and <code>Form1.Designer.cs</code>(code behind file).</p> <p>In one line the conclusion is that make sure ;</p> <p><code>Any event handler function in Form1.cs</code> starts with <strong>private void ....</strong>,and the words after private void are exactly same as defined in the code behind file for that particular control.If you would like to read more about this stuff,have a look <a href="http://www.codeproject.com/Articles/5043/Step-by-Step-Event-handling-in-C" rel="nofollow">here</a>.</p> <p>Hope it would have helped you to solve the issue.Anything else left please inform me.</p>
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    1. COThey actually do, there is a distinct lack of spacing in the code that was posted. i.e. `privatevoidbtnMarketing_Click(objectsender, EventArgse)` which should be `private void btnMarketing_Click(object sender, EventArgs e)` you could be right, but the OP should be having issues compiling what they posted.
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    2. CO@MarkHall ,I guess they forgot to mention the compilation error,or what else could be the cause ?
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    3. CODon't know they have gone silent. They actually need to step through the program to see what is happening. Anything we can come up with at this time is pure conjecture
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