C # An exception occurs when the type of the initial value is set.

Today, we use vs2010 to compile the C # program. After the program is successfully compiled, click Run to start the program. The pop-up box prompts an error, as shown in the following figure. Breakpoint debugging, the program did not even enter the main function !! For more information, see (1) reflection mechanism (2) Incorrect app. config file format (3) Assembly reference. After judgment, none of the above are met. Finally, we found that the 64-bit startup project's target platform was configured with x86, and started successfully after being changed to 64-bit. Because this project was not created by myself, I had no instinct to check the property configuration. Here we record it for future reference, which is also convenient for later users.