What is CS0414?

Symptoms

The following warning is appearing in the console:

warning CS0414: The private field `___' is assigned but its value is never used

Cause

The CS0414 warning appears when a variable with the private access modifier is assigned with a value, but the value is not used in any of the scripts in the project. 

Note: A variable with no access modifier defined is defaulted to private.

Here is how the warning appears in this example:

warning CS0414: The private field `ExampleScript.rigidbodyPlayer' is 
assigned but its value is never used

Resolution

The error CS0414 is resolved by using the variable with the private access modifier in the script, or by deleting it entirely.

More Information

https://msdn.microsoft.com/en-us/library/z62k595w(v=vs.90).aspx