public override HardwareVertexBuffer CreateVertexBuffer( VertexDeclaration vertexDeclaration, int numVerts, BufferUsage usage, bool useShadowBuffer )
		{
			var vertexBuffer = new GLES2HardwareVertexBuffer( this, vertexDeclaration, numVerts, usage, true );
			lock ( VertexBuffersMutex )
			{
				vertexBuffers.Add( vertexBuffer );
			}
			return vertexBuffer;
		}
        public override HardwareVertexBuffer CreateVertexBuffer(VertexDeclaration vertexDeclaration, int numVerts, BufferUsage usage, bool useShadowBuffer)
        {
            var vertexBuffer = new GLES2HardwareVertexBuffer(this, vertexDeclaration, numVerts, usage, true);

            lock ( VertexBuffersMutex )
            {
                vertexBuffers.Add(vertexBuffer);
            }
            return(vertexBuffer);
        }