get the unicode of a character in c#

[C# Programming]

i'm trying to get the unicode value of a character when the character is given , for example, i can get the character using

string s = '\u0061';so the character is assigned to s , but now i want the vise versa , means i want to get the unicode of the s , the result should be '\u0061'.
any one gat an idea .

thanx in advance.