Compiler Error CS1560
Invalid filename specified for preprocessor directive. Filename is too long or not a valid filename
The file name that was specified with #line (C# Reference) exceeded _MAX_PATH (256 characters) or the line on which #line was found exceeded 2000 characters.
Example
The following sample generates CS1560.
// cs1560.cs
using System;
class MyClass
{
public static void Main()
{
Console.WriteLine("Normal line #1.");
#line 21 "MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890MyFile1234567890.txt" // CS1560
}
}