what is the meaning of this error in C#.net?

Question

Error Name:

The call is ambiguous between the following methods or properties: 'System.Math.Floor(decimal)' and 'System.Math.Floor(double)'....

This is my program line:

The above error shows here in my program. i dono how to correct this error...

short nHalf = (short)Math.Floor(nDegree/2);

Alan · Answer

The Math.Floor method has two overrides - one that takes a double argument and one that takes a decimal. I would imagine that the variable nDegree is some kind of integer and therefore so too is nDegree/2. Consequently the compiler doesn't know which override to use. However unless nDegree can be negative you don't actually need to use Math.Floor here.If nDegree is even then nDegree/2 will be exactly one half of it and if nDegree is odd (45 say) then nDegree/2 will be automatically rounded down to the lower integer (i.e. 22). So you could just use: short nHalf = (short)(nDegree/2); However if nDegree could be negative you could use: short nHalf = (short)Math.Floor((double)nDegree/2.0); The cast and use of a double literal (i.e. 2.0) forces the compiler to use floating point arithmetic instead of integer arithmetic.