This enumeration lists the various ways in which you can lock a bitmap with the Bitmap.LockBits() method. You should pick the option that most closely matches your requirements, as the framework can optimize the marshaling of the pixel data.

public enum ImageLockMode {
   ReadOnly = 1,
   WriteOnly = 2,
   ReadWrite = 3,
   UserInputBuffer = 4
}

Hierarchy

System.Object System.ValueType System.Enum(System.IComparabl, System.IFormattable, System.IConvertible) ImageLockMode

Passed To

System.Drawing.Bitmap.LockBits()