[Proposal] Simplification of Constant Declarations.

[killer-frog]

Often find myself declaring constants where the value isn't actually important - just having the same constant is. So often i write

const string LastUpdatedKey = "LastupdatedKey";

would be nice if we could just write

const string LastUpdatedKey;

[svick]

This would mean that const string LastUpdatedKey; and readonly string LastUpdatedKey; are initialized to completely different values. I don't think that would be a good idea.

[killer-frog]

interesting point, although the difference is that a readonly string is set at runtime whilst a const string is define at compile time (in my suggestion the standard const definition of a string would still be valid)

for a read only string this is valid

	public class Cl
	{
		public readonly string str;
		
		public Cl (string val)
		{
			str = val;
		}
	}

[huoyaoyuan]

const string LastUpdatedKey = nameof(LastUpdatedKey);

This pattern is widely used in the roslyn codebase.