System. Accessviolationexception: an attempt was made to read or write to protected memory. This usually indicates that other memory is corrupted

I have encountered such problems before , Has not been resolved , Finally, reinstall the system , It's finally settled .

little does one think 1 A month later , This happened again , Let me run , This decision must find out the reason ;

Found after debugging , connection.Open(); Report errors later ,System.AccessViolationException: Trying to read or write to protected memory . This usually indicates that other memory is corrupted , A lot of online searches are useless .

Then I found out It is good to connect to the local database , An error is reported when connecting to the remote database , But in sql server Management Medium is good  

And then in VS A problem was found in the service explorer of , Find out VS2010 , As soon as you connect to the remote database, it will be shut down immediately ,VS2008 Is good , Finally, I found that at the moment of turning off , A prompt will pop up , After several repeated screenshots , Finally found the key ：

provider SSLProvider error:0

Search the Internet , Be suddenly enlightened , The solution is as follows ：

1： Use OLEDB , No longer use SQLClient Can solve ;

2： This is the most convenient , In the start run bar Input CMD, Then run as Administrator ： Input ：netsh winsock reset after , The system prompts that the computer needs to be restarted , Solve after restart ！

Finally, I would like to add , The meaning of this order ：

  netsh winsock reset command , The function is to reset Winsock Catalog . If... On a machine Winsock If there is a problem with the protocol configuration, it will lead to problems such as network connection , It needs to be used. netsh winsock reset Command to reset Winsock Directory to restore the network . This command reinitializes the network environment , To resolve software conflicts 、 Parameter error caused by virus . netsh It is an interface that can operate almost all network related settings through the command line , Setting up IP,DNS, network card , Wireless network, etc ,Winsock It is the internal directory of the system ,Winsock yes Windows Network programming interface ,winsock Working in the application layer , It provides a high-level data transmission programming interface independent of the underlying transmission protocol ,reset It's right Winsock Reset operation for . When performing the winsock After restarting the computer , Need to reconfigure IP.