Invalid length for a Base-64 char array

Invalid length for a Base-64 char array.

First of all check your string length whenever you face this error.

It came when you use to convert string into byte using Convert.FromBase64String.

 This method takes the array of char from your string. If char length < 64 then it will throw the above exception.

You must need to check the char length before calling this.

You can create this exception like:

// is OK

Byte[] bt1=Convert.FromBase64String("ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKL");

// will throw Exception

Byte[] bt2 = Convert.FromBase64String("ABCDEFGHIJKLMNOPQRSTUVWXYZ");

It will ignore the space

// will also throw Exception because of Space

            Byte[] bt2 = Convert.FromBase64String("ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJ");