Related to #43795

Version Used: 226c0c3

Steps to Reproduce:

partial class Program
{
    public static partial int M1();

    partial void M2();

    partial $$ // cursor here
}

Expected Behavior:
Completion list shows options for M1 as well as M2

Actual Behavior:
Completion list only shows an option for M2

Most likely the change needs to be made in PartialMethodCompletionProvider.