Bad array declarator: To declare a managed array the rank specifier precedes the variable's identifier. To declare a fixed size buffer field, use the fixed keyword before the field type

Wrong Declaration

char CopiedString[];

char[] CopiedString;

Correct Declaration

char[] CopiedString = new char[3];

char[] CopiedString = xyz;

http://dotnetdud.blogspot.com/2008/08/bad-array-declarator-to-declare-managed.html