mixed-space C# source code

MixedSpaces.cs

var a = new[] {
				0,
1,
2,
    3,
    4,
    5,
    6,
    7,
    8,
    9,
    10,
    11,
    12,
    13,
    14,
    15,
    16,
    17,
    18,
　　　　19,
};

WriteMixedSpace.cs

using var f = new StreamWriter("a.cs");

var ws = new[] { 0x0009, 0x000B, 0x000C, 0x20, 0xA0, 0x1680, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000 }.Select(i => (char)i).ToArray();

f.WriteLine("""
    var a = new[] {
    """);

for (int i = 0; i < ws.Length; i++)
{
    var w = ws[i];
    f.WriteLine($"{w}{w}{w}{w}{i},");
}

f.WriteLine("""
    };
    """);