Compiler Error CS0843

  • Article

Backing field for automatically implemented property 'name' must be fully assigned before control is returned to the caller. Consider calling the default constructor from a constructor initializer.

To assign a value to an automatically-implemented property from a constructor, you must first invoke the default constructor to create the object.

To correct this error

  • Add a call to the default constructor in a constructor initializer as shown in the following example. Note the use of : this(). For more information, see this (C# Reference).

Example

The following code generates CS0843:

// cs0843.cs
struct S
{
    public int AIProp { get; set; }
    public S(int i){} //CS0843
    // Try the following lines instead.
   // public S(int i) : this()
   // {
   //     AIProp = i;
   // }
}

class Test
{
    static int Main()
    {
        return 1;
    }
}