Testing for 64 Bit or 32 Bit in a C# Application

A quick and dirty way to see if the application's current platform is 64 Bit or 32 Bit is to test the size of the System.IntPtr variable, as shown in the following example:

if (System.IntPtr.Size == 8) 
{ 
    // 64-bit 
} 
else 
{ 
    // 32-bit 
}