sizeof C# with Example

Returns an int holding the size of a type* in bytes. 
sizeof(bool) // Returns 1. 
// Returns 1. 
sizeof(byte) 
sizeof(sbyte) // Returns 1. 
// Returns 2. 
sizeof(char) 
// Returns 2. 
sizeof(short) 
// Returns 2. 
sizeof(ushort) 
// Returns 4. 
sizeof(int) 
// Returns 4. 
sizeof(uint) 
// Returns 4. 
sizeof(float) 
sizeof(long) // Returns 8. 
// Returns 8. 
sizeof(ulong) 
// Returns 8. 
sizeof(double) 
sizeof(decimal) // Returns 16. 
*Only supports certain primitive types in safe context. 
 

In an unsafe context, sizeof can be used to return the size of other primitive types and structs. 
public struct CustomType 
{ 
public int value; 
} 
static void Main() 
{ 
unsafe 
{ 
Console.WriteLine(sizeof(CustomType)); // outputs: 4 
} 
}