Get a Texture2D from a Bitmap image.

BitmapToTexture2D.cs

public static Texture2D BitmapToTexture2D(GraphicsDevice GraphicsDevice, System.Drawing.Bitmap image)
{  
    // Buffer size is size of color array multiplied by 4 because   
    // each pixel has four color bytes  
    int bufferSize = image.Height * image.Width * 4;  
 
    // Create new memory stream and save image to stream so   
    // we don't have to save and read file  
    System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(bufferSize);  
    image.Save(memoryStream, System.Drawing.Imaging.ImageFormat.Png);  
 
    // Creates a texture from IO.Stream - our memory stream  
    Texture2D texture = Texture2D.FromStream(GraphicsDevice, memoryStream);  
 
    return texture;  
}