How to test for String = Enum.Value?

How do I do a simple compare of an enum value and a string that should match the enums name?

How do I parse the string into it's appropriate enum value.

For example,

Enum A
     B=0
     C=1
     D=2
End Enum

How do I check if String = A.C and how do I convert string into its corresponding A value without comparing it to a string representation?