Answer / aravind

constant : it ll take the values at compile time ,,in
constant u cant change values .....


Read-Only : i ll take values at run time espessailly u can
use this for date functions

Answer / rafi

if we use constantat first only value should be assigned
where as
in readonly the value can be assigned any time but it
should not be modified

Answer / vathsala

A quick synopsis on the differences between 'const'
and 'readonly' in C#:

'const':
1.Can't be static.
2.Value is evaluated at compile time.
3.Initiailized at declaration only.

'readonly':
1.Can be either instance-level or static.
2.Value is evaluated at run time.
3.Can be initialized in declaration or by code in the
constructor.

Answer / bhuvana

Read Only and Constant are like variables whose value once
given (initialized) cannot be changed.

The difference between Read Only and Constant is that
Constant can only be initialised at the time of declartion
but
Read Only field can be initialised at the time of
declartion or in constructor.

Answer / ganesh

a constant must be initialized at the time of decleration
and this value cannot be changed anywhere in the program.

whereas a readonly can be initialized at anywhere in the
program and the value can be changed

Answer / xiaof

A const field can only be initialized at the declaration of
the field. A readonly field can be initialized either at
the declaration or in a constructor. Therefore, readonly
fields can have different values depending on the
constructor used. Also, while a const field is a compile-
time constant, the readonly field can be used for runtime
constants as in the following example:
public static readonly uint l1 = (uint) DateTime.Now.Ticks;

Answer / payal mehta

A constant value must be initialized at the time of
declaration
and this value cannot be changed anywhere in the program.

A Read-only value can be assigned any time but it
should not be modified anywhere in the program.we can only
view not edit its value.

Answer / nithya

A readonly can be initialized only the time of variable
declaration or only in the constrator,Apart from that we
cannt modify anywhere in our program.

But Constant must be initialized at the time of declaration.
And this value cannt be changed in constractor level also.

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