Application has stopped working error with .exe file but runs well with Visual Studio?

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C#

C#4.0

Dear Sir,

I have a really wierd problem and have been stuck for days.
I have a project created with VS Express 2013 on my Win7 64-bit notebook.

All the functions work well in my project except the FW update function. The FW update function works well with VS Express 2013 but fails when I run the .exe file under the debug folder. It will show “xxx has stopped working” at the end of the update procedure.

I get three error log files from C:\users\......

1. WERCE38.tmp.WERInternalMetadata.xml

<?xml version="1.0" encoding="UTF-16"?>
<WERReportMetadata>
    <OSVersionInformation>
        <WindowsNTVersion>6.1</WindowsNTVersion>
        <Build>7601 Service Pack 1</Build>
        <Product>(0x1): Windows 7 Ultimate</Product>
        <Edition>Ultimate</Edition>
        <BuildString>7601.18798.amd64fre.win7sp1_gdr.150316-1654</BuildString>
        <Revision>1130</Revision>
        <Flavor>Multiprocessor Free</Flavor>
        <Architecture>X64</Architecture>
        <LCID>1028</LCID>
    </OSVersionInformation>
    <ProblemSignatures>
        <EventType>CLR20r3</EventType>
        <Parameter0>EA Power Control.exe</Parameter0>
        <Parameter1>1.0.0.0</Parameter1>
        <Parameter2>554b2236</Parameter2>
        <Parameter3>mscorlib</Parameter3>
        <Parameter4>4.0.30319.34209</Parameter4>
        <Parameter5>534894cc</Parameter5>
        <Parameter6>137b</Parameter6>
        <Parameter7>13</Parameter7>
        <Parameter8>System.ObjectDisposedException</Parameter8>
    </ProblemSignatures>
    <DynamicSignatures>
        <Parameter1>6.1.7601.2.1.0.256.1</Parameter1>
        <Parameter2>1028</Parameter2>
        <Parameter22>0a9e</Parameter22>
        <Parameter23>0a9e372d3b4ad19135b953a78882e789</Parameter23>
        <Parameter24>0a9e</Parameter24>
        <Parameter25>0a9e372d3b4ad19135b953a78882e789</Parameter25>
    </DynamicSignatures>
    <SystemInformation>
        <MID>061F2CDA-D9D3-49C1-BB68-95575E25AA54</MID>
        <SystemManufacturer>ASUSTeK COMPUTER INC.</SystemManufacturer>
        <SystemProductName>X550VB</SystemProductName>
        <BIOSVersion>X550VB.213</BIOSVersion>
    </SystemInformation>
</WERReportMetadata>

2. WERE61C.tmp.appcompat.txt
3. WERE63C.tmp.mdmp

More information:
My application will close the serial port in the end of the update. In the output window of VS Express 2013, I can see a close serial port exception dump by myself, but the program keeps running. Is that the root cause?

Why does application have stopped working error with .exe file but run well with Visual Studio?

Really appreciate your advice and help!!

Eric